/*!

* Modernizr v2.0.6
* http://www.modernizr.com
*
* Copyright (c) 2009-2011 Faruk Ates, Paul Irish, Alex Sexton
* Dual-licensed under the BSD or MIT licenses: www.modernizr.com/license/
*/

/*

* Modernizr tests which native CSS3 and HTML5 features are available in
* the current UA and makes the results available to you in two ways:
* as properties on a global Modernizr object, and as classes on the
* <html> element. This information allows you to progressively enhance
* your pages with a granular level of control over the experience.
*
* Modernizr has an optional (not included) conditional resource loader
* called Modernizr.load(), based on Yepnope.js (yepnopejs.com).
* To get a build that includes Modernizr.load(), as well as choosing
* which tests to include, go to www.modernizr.com/download/
*
* Authors        Faruk Ates, Paul Irish, Alex Sexton, 
* Contributors   Ryan Seddon, Ben Alman
*/

window.Modernizr = (function( window, document, undefined ) {

var version = '2.0.6',

Modernizr = {},

// option for enabling the HTML classes to be added
enableClasses = true,

docElement = document.documentElement,
docHead = document.head || document.getElementsByTagName('head')[0],

/**
 * Create our "modernizr" element that we do most feature tests on.
 */
mod = 'modernizr',
modElem = document.createElement(mod),
mStyle = modElem.style,

/**
 * Create the input element for various Web Forms feature tests.
 */
inputElem = document.createElement('input'),

smile = ':)',

toString = Object.prototype.toString,

// List of property values to set for css tests. See ticket #21
prefixes = ' -webkit- -moz- -o- -ms- -khtml- '.split(' '),

// Following spec is to expose vendor-specific style properties as:
//   elem.style.WebkitBorderRadius
// and the following would be incorrect:
//   elem.style.webkitBorderRadius

// Webkit ghosts their properties in lowercase but Opera & Moz do not.
// Microsoft foregoes prefixes entirely <= IE8, but appears to
//   use a lowercase `ms` instead of the correct `Ms` in IE9

// More here: http://github.com/Modernizr/Modernizr/issues/issue/21
domPrefixes = 'Webkit Moz O ms Khtml'.split(' '),

ns = {'svg': 'http://www.w3.org/2000/svg'},

tests = {},
inputs = {},
attrs = {},

classes = [],

featureName, // used in testing loop

// Inject element with style element and some CSS rules
injectElementWithStyles = function( rule, callback, nodes, testnames ) {

  var style, ret, node,
      div = document.createElement('div');

  if ( parseInt(nodes, 10) ) {
      // In order not to give false positives we create a node for each test
      // This also allows the method to scale for unspecified uses
      while ( nodes-- ) {
          node = document.createElement('div');
          node.id = testnames ? testnames[nodes] : mod + (nodes + 1);
          div.appendChild(node);
      }
  }

  // <style> elements in IE6-9 are considered 'NoScope' elements and therefore will be removed
  // when injected with innerHTML. To get around this you need to prepend the 'NoScope' element
  // with a 'scoped' element, in our case the soft-hyphen entity as it won't mess with our measurements.
  // http://msdn.microsoft.com/en-us/library/ms533897%28VS.85%29.aspx
  style = ['&shy;', '<style>', rule, '</style>'].join('');
  div.id = mod;
  div.innerHTML += style;
  docElement.appendChild(div);

  ret = callback(div, rule);
  div.parentNode.removeChild(div);

  return !!ret;

},

// adapted from matchMedia polyfill
// by Scott Jehl and Paul Irish
// gist.github.com/786768
testMediaQuery = function( mq ) {

  if ( window.matchMedia ) {
    return matchMedia(mq).matches;
  }

  var bool;

  injectElementWithStyles('@media ' + mq + ' { #' + mod + ' { position: absolute; } }', function( node ) {
    bool = (window.getComputedStyle ?
              getComputedStyle(node, null) :
              node.currentStyle)['position'] == 'absolute';
  });

  return bool;

 },

/**
  * isEventSupported determines if a given element supports the given event
  * function from http://yura.thinkweb2.com/isEventSupported/
  */
isEventSupported = (function() {

  var TAGNAMES = {
    'select': 'input', 'change': 'input',
    'submit': 'form', 'reset': 'form',
    'error': 'img', 'load': 'img', 'abort': 'img'
  };

  function isEventSupported( eventName, element ) {

    element = element || document.createElement(TAGNAMES[eventName] || 'div');
    eventName = 'on' + eventName;

    // When using `setAttribute`, IE skips "unload", WebKit skips "unload" and "resize", whereas `in` "catches" those
    var isSupported = eventName in element;

    if ( !isSupported ) {
      // If it has no `setAttribute` (i.e. doesn't implement Node interface), try generic element
      if ( !element.setAttribute ) {
        element = document.createElement('div');
      }
      if ( element.setAttribute && element.removeAttribute ) {
        element.setAttribute(eventName, '');
        isSupported = is(element[eventName], 'function');

        // If property was created, "remove it" (by setting value to `undefined`)
        if ( !is(element[eventName], undefined) ) {
          element[eventName] = undefined;
        }
        element.removeAttribute(eventName);
      }
    }

    element = null;
    return isSupported;
  }
  return isEventSupported;
})();

// hasOwnProperty shim by kangax needed for Safari 2.0 support
var _hasOwnProperty = ({}).hasOwnProperty, hasOwnProperty;
if ( !is(_hasOwnProperty, undefined) && !is(_hasOwnProperty.call, undefined) ) {
  hasOwnProperty = function (object, property) {
    return _hasOwnProperty.call(object, property);
  };
}
else {
  hasOwnProperty = function (object, property) { /* yes, this can give false positives/negatives, but most of the time we don't care about those */
    return ((property in object) && is(object.constructor.prototype[property], undefined));
  };
}

/**
 * setCss applies given styles to the Modernizr DOM node.
 */
function setCss( str ) {
    mStyle.cssText = str;
}

/**
 * setCssAll extrapolates all vendor-specific css strings.
 */
function setCssAll( str1, str2 ) {
    return setCss(prefixes.join(str1 + ';') + ( str2 || '' ));
}

/**
 * is returns a boolean for if typeof obj is exactly type.
 */
function is( obj, type ) {
    return typeof obj === type;
}

/**
 * contains returns a boolean for if substr is found within str.
 */
function contains( str, substr ) {
    return !!~('' + str).indexOf(substr);
}

/**
 * testProps is a generic CSS / DOM property test; if a browser supports
 *   a certain property, it won't return undefined for it.
 *   A supported CSS property returns empty string when its not yet set.
 */
function testProps( props, prefixed ) {
    for ( var i in props ) {
        if ( mStyle[ props[i] ] !== undefined ) {
            return prefixed == 'pfx' ? props[i] : true;
        }
    }
    return false;
}

/**
 * testPropsAll tests a list of DOM properties we want to check against.
 *   We specify literally ALL possible (known and/or likely) properties on
 *   the element including the non-vendor prefixed one, for forward-
 *   compatibility.
 */
function testPropsAll( prop, prefixed ) {

    var ucProp  = prop.charAt(0).toUpperCase() + prop.substr(1),
        props   = (prop + ' ' + domPrefixes.join(ucProp + ' ') + ucProp).split(' ');

    return testProps(props, prefixed);
}

/**
 * testBundle tests a list of CSS features that require element and style injection.
 *   By bundling them together we can reduce the need to touch the DOM multiple times.
 */
/*>>testBundle*/
var testBundle = (function( styles, tests ) {
    var style = styles.join(''),
        len = tests.length;

    injectElementWithStyles(style, function( node, rule ) {
        var style = document.styleSheets[document.styleSheets.length - 1],
            // IE8 will bork if you create a custom build that excludes both fontface and generatedcontent tests.
            // So we check for cssRules and that there is a rule available
            // More here: https://github.com/Modernizr/Modernizr/issues/288 & https://github.com/Modernizr/Modernizr/issues/293
            cssText = style.cssRules && style.cssRules[0] ? style.cssRules[0].cssText : style.cssText || "",
            children = node.childNodes, hash = {};

        while ( len-- ) {
            hash[children[len].id] = children[len];
        }

        /*>>touch*/           Modernizr['touch'] = ('ontouchstart' in window) || hash['touch'].offsetTop === 9; /*>>touch*/
        /*>>csstransforms3d*/ Modernizr['csstransforms3d'] = hash['csstransforms3d'].offsetLeft === 9;          /*>>csstransforms3d*/
        /*>>generatedcontent*/Modernizr['generatedcontent'] = hash['generatedcontent'].offsetHeight >= 1;       /*>>generatedcontent*/
        /*>>fontface*/        Modernizr['fontface'] = /src/i.test(cssText) &&
                                                              cssText.indexOf(rule.split(' ')[0]) === 0;        /*>>fontface*/
    }, len, tests);

})([
    // Pass in styles to be injected into document
    /*>>fontface*/        '@font-face {font-family:"font";src:url("https://")}'         /*>>fontface*/

    /*>>touch*/           ,['@media (',prefixes.join('touch-enabled),('),mod,')',
                            '{#touch{top:9px;position:absolute}}'].join('')           /*>>touch*/

    /*>>csstransforms3d*/ ,['@media (',prefixes.join('transform-3d),('),mod,')',
                            '{#csstransforms3d{left:9px;position:absolute}}'].join('')/*>>csstransforms3d*/

    /*>>generatedcontent*/,['#generatedcontent:after{content:"',smile,'";visibility:hidden}'].join('')  /*>>generatedcontent*/
],
  [
    /*>>fontface*/        'fontface'          /*>>fontface*/
    /*>>touch*/           ,'touch'            /*>>touch*/
    /*>>csstransforms3d*/ ,'csstransforms3d'  /*>>csstransforms3d*/
    /*>>generatedcontent*/,'generatedcontent' /*>>generatedcontent*/

]);/*>>testBundle*/

/**
 * Tests
 * -----
 */

tests['flexbox'] = function() {
    /**
     * setPrefixedValueCSS sets the property of a specified element
     * adding vendor prefixes to the VALUE of the property.
     * @param {Element} element
     * @param {string} property The property name. This will not be prefixed.
     * @param {string} value The value of the property. This WILL be prefixed.
     * @param {string=} extra Additional CSS to append unmodified to the end of
     * the CSS string.
     */
    function setPrefixedValueCSS( element, property, value, extra ) {
        property += ':';
        element.style.cssText = (property + prefixes.join(value + ';' + property)).slice(0, -property.length) + (extra || '');
    }

    /**
     * setPrefixedPropertyCSS sets the property of a specified element
     * adding vendor prefixes to the NAME of the property.
     * @param {Element} element
     * @param {string} property The property name. This WILL be prefixed.
     * @param {string} value The value of the property. This will not be prefixed.
     * @param {string=} extra Additional CSS to append unmodified to the end of
     * the CSS string.
     */
    function setPrefixedPropertyCSS( element, property, value, extra ) {
        element.style.cssText = prefixes.join(property + ':' + value + ';') + (extra || '');
    }

    var c = document.createElement('div'),
        elem = document.createElement('div');

    setPrefixedValueCSS(c, 'display', 'box', 'width:42px;padding:0;');
    setPrefixedPropertyCSS(elem, 'box-flex', '1', 'width:10px;');

    c.appendChild(elem);
    docElement.appendChild(c);

    var ret = elem.offsetWidth === 42;

    c.removeChild(elem);
    docElement.removeChild(c);

    return ret;
};

// On the S60 and BB Storm, getContext exists, but always returns undefined
// http://github.com/Modernizr/Modernizr/issues/issue/97/

tests['canvas'] = function() {
    var elem = document.createElement('canvas');
    return !!(elem.getContext && elem.getContext('2d'));
};

tests['canvastext'] = function() {
    return !!(Modernizr['canvas'] && is(document.createElement('canvas').getContext('2d').fillText, 'function'));
};

// This WebGL test may false positive. 
// But really it's quite impossible to know whether webgl will succeed until after you create the context. 
// You might have hardware that can support a 100x100 webgl canvas, but will not support a 1000x1000 webgl 
// canvas. So this feature inference is weak, but intentionally so.

// It is known to false positive in FF4 with certain hardware and the iPad 2.

tests['webgl'] = function() {
    return !!window.WebGLRenderingContext;
};

/*
 * The Modernizr.touch test only indicates if the browser supports
 *    touch events, which does not necessarily reflect a touchscreen
 *    device, as evidenced by tablets running Windows 7 or, alas,
 *    the Palm Pre / WebOS (touch) phones.
 *
 * Additionally, Chrome (desktop) used to lie about its support on this,
 *    but that has since been rectified: http://crbug.com/36415
 *
 * We also test for Firefox 4 Multitouch Support.
 *
 * For more info, see: http://modernizr.github.com/Modernizr/touch.html
 */

tests['touch'] = function() {
    return Modernizr['touch'];
};

/**
 * geolocation tests for the new Geolocation API specification.
 *   This test is a standards compliant-only test; for more complete
 *   testing, including a Google Gears fallback, please see:
 *   http://code.google.com/p/geo-location-javascript/
 * or view a fallback solution using google's geo API:
 *   http://gist.github.com/366184
 */
tests['geolocation'] = function() {
    return !!navigator.geolocation;
};

// Per 1.6:
// This used to be Modernizr.crosswindowmessaging but the longer
// name has been deprecated in favor of a shorter and property-matching one.
// The old API is still available in 1.6, but as of 2.0 will throw a warning,
// and in the first release thereafter disappear entirely.
tests['postmessage'] = function() {
  return !!window.postMessage;
};

// Web SQL database detection is tricky:

// In chrome incognito mode, openDatabase is truthy, but using it will
//   throw an exception: http://crbug.com/42380
// We can create a dummy database, but there is no way to delete it afterwards.

// Meanwhile, Safari users can get prompted on any database creation.
//   If they do, any page with Modernizr will give them a prompt:
//   http://github.com/Modernizr/Modernizr/issues/closed#issue/113

// We have chosen to allow the Chrome incognito false positive, so that Modernizr
//   doesn't litter the web with these test databases. As a developer, you'll have
//   to account for this gotcha yourself.
tests['websqldatabase'] = function() {
  var result = !!window.openDatabase;
  /*  if (result){
        try {
          result = !!openDatabase( mod + "testdb", "1.0", mod + "testdb", 2e4);
        } catch(e) {
        }
      }  */
  return result;
};

// Vendors had inconsistent prefixing with the experimental Indexed DB:
// - Webkit's implementation is accessible through webkitIndexedDB
// - Firefox shipped moz_indexedDB before FF4b9, but since then has been mozIndexedDB
// For speed, we don't test the legacy (and beta-only) indexedDB
tests['indexedDB'] = function() {
  for ( var i = -1, len = domPrefixes.length; ++i < len; ){
    if ( window[domPrefixes[i].toLowerCase() + 'IndexedDB'] ){
      return true;
    }
  }
  return !!window.indexedDB;
};

// documentMode logic from YUI to filter out IE8 Compat Mode
//   which false positives.
tests['hashchange'] = function() {
  return isEventSupported('hashchange', window) && (document.documentMode === undefined || document.documentMode > 7);
};

// Per 1.6:
// This used to be Modernizr.historymanagement but the longer
// name has been deprecated in favor of a shorter and property-matching one.
// The old API is still available in 1.6, but as of 2.0 will throw a warning,
// and in the first release thereafter disappear entirely.
tests['history'] = function() {
  return !!(window.history && history.pushState);
};

tests['draganddrop'] = function() {
    return isEventSupported('dragstart') && isEventSupported('drop');
};

// Mozilla is targeting to land MozWebSocket for FF6
// bugzil.la/659324
tests['websockets'] = function() {
    for ( var i = -1, len = domPrefixes.length; ++i < len; ){
      if ( window[domPrefixes[i] + 'WebSocket'] ){
        return true;
      }
    }
    return 'WebSocket' in window;
};

// http://css-tricks.com/rgba-browser-support/
tests['rgba'] = function() {
    // Set an rgba() color and check the returned value

    setCss('background-color:rgba(150,255,150,.5)');

    return contains(mStyle.backgroundColor, 'rgba');
};

tests['hsla'] = function() {
    // Same as rgba(), in fact, browsers re-map hsla() to rgba() internally,
    //   except IE9 who retains it as hsla

    setCss('background-color:hsla(120,40%,100%,.5)');

    return contains(mStyle.backgroundColor, 'rgba') || contains(mStyle.backgroundColor, 'hsla');
};

tests['multiplebgs'] = function() {
    // Setting multiple images AND a color on the background shorthand property
    //  and then querying the style.background property value for the number of
    //  occurrences of "url(" is a reliable method for detecting ACTUAL support for this!

    setCss('background:url(https://),url(https://),red url(https://)');

    // If the UA supports multiple backgrounds, there should be three occurrences
    //   of the string "url(" in the return value for elemStyle.background

    return /(url\s*\(.*?){3}/.test(mStyle.background);
};

// In testing support for a given CSS property, it's legit to test:
//    `elem.style[styleName] !== undefined`
// If the property is supported it will return an empty string,
// if unsupported it will return undefined.

// We'll take advantage of this quick test and skip setting a style
// on our modernizr element, but instead just testing undefined vs
// empty string.

tests['backgroundsize'] = function() {
    return testPropsAll('backgroundSize');
};

tests['borderimage'] = function() {
    return testPropsAll('borderImage');
};

// Super comprehensive table about all the unique implementations of
// border-radius: http://muddledramblings.com/table-of-css3-border-radius-compliance

tests['borderradius'] = function() {
    return testPropsAll('borderRadius');
};

// WebOS unfortunately false positives on this test.
tests['boxshadow'] = function() {
    return testPropsAll('boxShadow');
};

// FF3.0 will false positive on this test
tests['textshadow'] = function() {
    return document.createElement('div').style.textShadow === '';
};

tests['opacity'] = function() {
    // Browsers that actually have CSS Opacity implemented have done so
    //  according to spec, which means their return values are within the
    //  range of [0.0,1.0] - including the leading zero.

    setCssAll('opacity:.55');

    // The non-literal . in this regex is intentional:
    //   German Chrome returns this value as 0,55
    // https://github.com/Modernizr/Modernizr/issues/#issue/59/comment/516632
    return /^0.55$/.test(mStyle.opacity);
};

tests['cssanimations'] = function() {
    return testPropsAll('animationName');
};

tests['csscolumns'] = function() {
    return testPropsAll('columnCount');
};

tests['cssgradients'] = function() {
    /**
     * For CSS Gradients syntax, please see:
     * http://webkit.org/blog/175/introducing-css-gradients/
     * https://developer.mozilla.org/en/CSS/-moz-linear-gradient
     * https://developer.mozilla.org/en/CSS/-moz-radial-gradient
     * http://dev.w3.org/csswg/css3-images/#gradients-
     */

    var str1 = 'background-image:',
        str2 = 'gradient(linear,left top,right bottom,from(#9f9),to(white));',
        str3 = 'linear-gradient(left top,#9f9, white);';

    setCss(
        (str1 + prefixes.join(str2 + str1) + prefixes.join(str3 + str1)).slice(0, -str1.length)
    );

    return contains(mStyle.backgroundImage, 'gradient');
};

tests['cssreflections'] = function() {
    return testPropsAll('boxReflect');
};

tests['csstransforms'] = function() {
    return !!testProps(['transformProperty', 'WebkitTransform', 'MozTransform', 'OTransform', 'msTransform']);
};

tests['csstransforms3d'] = function() {

    var ret = !!testProps(['perspectiveProperty', 'WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective']);

    // Webkit’s 3D transforms are passed off to the browser's own graphics renderer.
    //   It works fine in Safari on Leopard and Snow Leopard, but not in Chrome in
    //   some conditions. As a result, Webkit typically recognizes the syntax but
    //   will sometimes throw a false positive, thus we must do a more thorough check:
    if ( ret && 'webkitPerspective' in docElement.style ) {

      // Webkit allows this media query to succeed only if the feature is enabled.
      // `@media (transform-3d),(-o-transform-3d),(-moz-transform-3d),(-ms-transform-3d),(-webkit-transform-3d),(modernizr){ ... }`
      ret = Modernizr['csstransforms3d'];
    }
    return ret;
};

tests['csstransitions'] = function() {
    return testPropsAll('transitionProperty');
};

/*>>fontface*/
// @font-face detection routine by Diego Perini
// http://javascript.nwbox.com/CSSSupport/
tests['fontface'] = function() {
    return Modernizr['fontface'];
};
/*>>fontface*/

// CSS generated content detection
tests['generatedcontent'] = function() {
    return Modernizr['generatedcontent'];
};

// These tests evaluate support of the video/audio elements, as well as
// testing what types of content they support.
//
// We're using the Boolean constructor here, so that we can extend the value
// e.g.  Modernizr.video     // true
//       Modernizr.video.ogg // 'probably'
//
// Codec values from : http://github.com/NielsLeenheer/html5test/blob/9106a8/index.html#L845
//                     thx to NielsLeenheer and zcorpan

// Note: in FF 3.5.1 and 3.5.0, "no" was a return value instead of empty string.
//   Modernizr does not normalize for that.

tests['video'] = function() {
    var elem = document.createElement('video'),
        bool = false;

    // IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224
    try {
        if ( bool = !!elem.canPlayType ) {
            bool      = new Boolean(bool);
            bool.ogg  = elem.canPlayType('video/ogg; codecs="theora"');

            // Workaround required for IE9, which doesn't report video support without audio codec specified.
            //   bug 599718 @ msft connect
            var h264 = 'video/mp4; codecs="avc1.42E01E';
            bool.h264 = elem.canPlayType(h264 + '"') || elem.canPlayType(h264 + ', mp4a.40.2"');

            bool.webm = elem.canPlayType('video/webm; codecs="vp8, vorbis"');
        }

    } catch(e) { }

    return bool;
};

tests['audio'] = function() {
    var elem = document.createElement('audio'),
        bool = false;

    try { 
        if ( bool = !!elem.canPlayType ) {
            bool      = new Boolean(bool);
            bool.ogg  = elem.canPlayType('audio/ogg; codecs="vorbis"');
            bool.mp3  = elem.canPlayType('audio/mpeg;');

            // Mimetypes accepted:
            //   https://developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
            //   http://bit.ly/iphoneoscodecs
            bool.wav  = elem.canPlayType('audio/wav; codecs="1"');
            bool.m4a  = elem.canPlayType('audio/x-m4a;') || elem.canPlayType('audio/aac;');
        }
    } catch(e) { }

    return bool;
};

// Firefox has made these tests rather unfun.

// In FF4, if disabled, window.localStorage should === null.

// Normally, we could not test that directly and need to do a
//   `('localStorage' in window) && ` test first because otherwise Firefox will
//   throw http://bugzil.la/365772 if cookies are disabled

// However, in Firefox 4 betas, if dom.storage.enabled == false, just mentioning
//   the property will throw an exception. http://bugzil.la/599479
// This looks to be fixed for FF4 Final.

// Because we are forced to try/catch this, we'll go aggressive.

// FWIW: IE8 Compat mode supports these features completely:
//   http://www.quirksmode.org/dom/html5.html
// But IE8 doesn't support either with local files

tests['localstorage'] = function() {
    try {
        return !!localStorage.getItem;
    } catch(e) {
        return false;
    }
};

tests['sessionstorage'] = function() {
    try {
        return !!sessionStorage.getItem;
    } catch(e){
        return false;
    }
};

tests['webworkers'] = function() {
    return !!window.Worker;
};

tests['applicationcache'] = function() {
    return !!window.applicationCache;
};

// Thanks to Erik Dahlstrom
tests['svg'] = function() {
    return !!document.createElementNS && !!document.createElementNS(ns.svg, 'svg').createSVGRect;
};

// specifically for SVG inline in HTML, not within XHTML
// test page: paulirish.com/demo/inline-svg
tests['inlinesvg'] = function() {
  var div = document.createElement('div');
  div.innerHTML = '<svg/>';
  return (div.firstChild && div.firstChild.namespaceURI) == ns.svg;
};

// Thanks to F1lt3r and lucideer, ticket #35
tests['smil'] = function() {
    return !!document.createElementNS && /SVG/.test(toString.call(document.createElementNS(ns.svg, 'animate')));
};

tests['svgclippaths'] = function() {
    // Possibly returns a false positive in Safari 3.2?
    return !!document.createElementNS && /SVG/.test(toString.call(document.createElementNS(ns.svg, 'clipPath')));
};

// input features and input types go directly onto the ret object, bypassing the tests loop.
// Hold this guy to execute in a moment.
function webforms() {
    // Run through HTML5's new input attributes to see if the UA understands any.
    // We're using f which is the <input> element created early on
    // Mike Taylr has created a comprehensive resource for testing these attributes
    //   when applied to all input types:
    //   http://miketaylr.com/code/input-type-attr.html
    // spec: http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary

    // Only input placeholder is tested while textarea's placeholder is not. 
    // Currently Safari 4 and Opera 11 have support only for the input placeholder
    // Both tests are available in feature-detects/forms-placeholder.js
    Modernizr['input'] = (function( props ) {
        for ( var i = 0, len = props.length; i < len; i++ ) {
            attrs[ props[i] ] = !!(props[i] in inputElem);
        }
        return attrs;
    })('autocomplete autofocus list placeholder max min multiple pattern required step'.split(' '));

    // Run through HTML5's new input types to see if the UA understands any.
    //   This is put behind the tests runloop because it doesn't return a
    //   true/false like all the other tests; instead, it returns an object
    //   containing each input type with its corresponding true/false value

    // Big thanks to @miketaylr for the html5 forms expertise. http://miketaylr.com/
    Modernizr['inputtypes'] = (function(props) {

        for ( var i = 0, bool, inputElemType, defaultView, len = props.length; i < len; i++ ) {

            inputElem.setAttribute('type', inputElemType = props[i]);
            bool = inputElem.type !== 'text';

            // We first check to see if the type we give it sticks..
            // If the type does, we feed it a textual value, which shouldn't be valid.
            // If the value doesn't stick, we know there's input sanitization which infers a custom UI
            if ( bool ) {

                inputElem.value         = smile;
                inputElem.style.cssText = 'position:absolute;visibility:hidden;';

                if ( /^range$/.test(inputElemType) && inputElem.style.WebkitAppearance !== undefined ) {

                  docElement.appendChild(inputElem);
                  defaultView = document.defaultView;

                  // Safari 2-4 allows the smiley as a value, despite making a slider
                  bool =  defaultView.getComputedStyle &&
                          defaultView.getComputedStyle(inputElem, null).WebkitAppearance !== 'textfield' &&
                          // Mobile android web browser has false positive, so must
                          // check the height to see if the widget is actually there.
                          (inputElem.offsetHeight !== 0);

                  docElement.removeChild(inputElem);

                } else if ( /^(search|tel)$/.test(inputElemType) ){
                  // Spec doesnt define any special parsing or detectable UI
                  //   behaviors so we pass these through as true

                  // Interestingly, opera fails the earlier test, so it doesn't
                  //  even make it here.

                } else if ( /^(url|email)$/.test(inputElemType) ) {
                  // Real url and email support comes with prebaked validation.
                  bool = inputElem.checkValidity && inputElem.checkValidity() === false;

                } else if ( /^color$/.test(inputElemType) ) {
                    // chuck into DOM and force reflow for Opera bug in 11.00
                    // github.com/Modernizr/Modernizr/issues#issue/159
                    docElement.appendChild(inputElem);
                    docElement.offsetWidth;
                    bool = inputElem.value != smile;
                    docElement.removeChild(inputElem);

                } else {
                  // If the upgraded input compontent rejects the :) text, we got a winner
                  bool = inputElem.value != smile;
                }
            }

            inputs[ props[i] ] = !!bool;
        }
        return inputs;
    })('search tel url email datetime date month week time datetime-local number range color'.split(' '));
}

// End of test definitions
// -----------------------

// Run through all tests and detect their support in the current UA.
// todo: hypothetically we could be doing an array of tests and use a basic loop here.
for ( var feature in tests ) {
    if ( hasOwnProperty(tests, feature) ) {
        // run the test, throw the return value into the Modernizr,
        //   then based on that boolean, define an appropriate className
        //   and push it into an array of classes we'll join later.
        featureName  = feature.toLowerCase();
        Modernizr[featureName] = tests[feature]();

        classes.push((Modernizr[featureName] ? '' : 'no-') + featureName);
    }
}

// input tests need to run.
Modernizr.input || webforms();

/**
 * addTest allows the user to define their own feature tests
 * the result will be added onto the Modernizr object,
 * as well as an appropriate className set on the html element
 *
 * @param feature - String naming the feature
 * @param test - Function returning true if feature is supported, false if not
 */
 Modernizr.addTest = function ( feature, test ) {
   if ( typeof feature == "object" ) {
     for ( var key in feature ) {
       if ( hasOwnProperty( feature, key ) ) { 
         Modernizr.addTest( key, feature[ key ] );
       }
     }
   } else {

     feature = feature.toLowerCase();

     if ( Modernizr[feature] !== undefined ) {
       // we're going to quit if you're trying to overwrite an existing test
       // if we were to allow it, we'd do this:
       //   var re = new RegExp("\\b(no-)?" + feature + "\\b");  
       //   docElement.className = docElement.className.replace( re, '' );
       // but, no rly, stuff 'em.
       return; 
     }

     test = typeof test == "boolean" ? test : !!test();

     docElement.className += ' ' + (test ? '' : 'no-') + feature;
     Modernizr[feature] = test;

   }

   return Modernizr; // allow chaining.
 };

// Reset modElem.cssText to nothing to reduce memory footprint.
setCss('');
modElem = inputElem = null;

//>>BEGIN IEPP
// Enable HTML 5 elements for styling (and printing) in IE.
if ( window.attachEvent && (function(){ var elem = document.createElement('div');
                                        elem.innerHTML = '<elem></elem>';
                                        return elem.childNodes.length !== 1; })() ) {

    // iepp v2 by @jon_neal & afarkas : github.com/aFarkas/iepp/
    (function(win, doc) {
      win.iepp = win.iepp || {};
      var iepp = win.iepp,
        elems = iepp.html5elements || 'abbr|article|aside|audio|canvas|datalist|details|figcaption|figure|footer|header|hgroup|mark|meter|nav|output|progress|section|summary|time|video',
        elemsArr = elems.split('|'),
        elemsArrLen = elemsArr.length,
        elemRegExp = new RegExp('(^|\\s)('+elems+')', 'gi'),
        tagRegExp = new RegExp('<(\/*)('+elems+')', 'gi'),
        filterReg = /^\s*[\{\}]\s*$/,
        ruleRegExp = new RegExp('(^|[^\\n]*?\\s)('+elems+')([^\\n]*)({[\\n\\w\\W]*?})', 'gi'),
        docFrag = doc.createDocumentFragment(),
        html = doc.documentElement,
        head = html.firstChild,
        bodyElem = doc.createElement('body'),
        styleElem = doc.createElement('style'),
        printMedias = /print|all/,
        body;
      function shim(doc) {
        var a = -1;
        while (++a < elemsArrLen)
          // Use createElement so IE allows HTML5-named elements in a document
          doc.createElement(elemsArr[a]);
      }

      iepp.getCSS = function(styleSheetList, mediaType) {
        if(styleSheetList+'' === undefined){return '';}
        var a = -1,
          len = styleSheetList.length,
          styleSheet,
          cssTextArr = [];
        while (++a < len) {
          styleSheet = styleSheetList[a];
          //currently no test for disabled/alternate stylesheets
          if(styleSheet.disabled){continue;}
          mediaType = styleSheet.media || mediaType;
          // Get css from all non-screen stylesheets and their imports
          if (printMedias.test(mediaType)) cssTextArr.push(iepp.getCSS(styleSheet.imports, mediaType), styleSheet.cssText);
          //reset mediaType to all with every new *not imported* stylesheet
          mediaType = 'all';
        }
        return cssTextArr.join('');
      };

      iepp.parseCSS = function(cssText) {
        var cssTextArr = [],
          rule;
        while ((rule = ruleRegExp.exec(cssText)) != null){
          // Replace all html5 element references with iepp substitute classnames
          cssTextArr.push(( (filterReg.exec(rule[1]) ? '\n' : rule[1]) +rule[2]+rule[3]).replace(elemRegExp, '$1.iepp_$2')+rule[4]);
        }
        return cssTextArr.join('\n');
      };

      iepp.writeHTML = function() {
        var a = -1;
        body = body || doc.body;
        while (++a < elemsArrLen) {
          var nodeList = doc.getElementsByTagName(elemsArr[a]),
            nodeListLen = nodeList.length,
            b = -1;
          while (++b < nodeListLen)
            if (nodeList[b].className.indexOf('iepp_') < 0)
              // Append iepp substitute classnames to all html5 elements
              nodeList[b].className += ' iepp_'+elemsArr[a];
        }
        docFrag.appendChild(body);
        html.appendChild(bodyElem);
        // Write iepp substitute print-safe document
        bodyElem.className = body.className;
        bodyElem.id = body.id;
        // Replace HTML5 elements with <font> which is print-safe and shouldn't conflict since it isn't part of html5
        bodyElem.innerHTML = body.innerHTML.replace(tagRegExp, '<$1font');
      };

      iepp._beforePrint = function() {
        // Write iepp custom print CSS
        styleElem.styleSheet.cssText = iepp.parseCSS(iepp.getCSS(doc.styleSheets, 'all'));
        iepp.writeHTML();
      };

      iepp.restoreHTML = function(){
        // Undo everything done in onbeforeprint
        bodyElem.innerHTML = '';
        html.removeChild(bodyElem);
        html.appendChild(body);
      };

      iepp._afterPrint = function(){
        // Undo everything done in onbeforeprint
        iepp.restoreHTML();
        styleElem.styleSheet.cssText = '';
      };

      // Shim the document and iepp fragment
      shim(doc);
      shim(docFrag);

      //
      if(iepp.disablePP){return;}

      // Add iepp custom print style element
      head.insertBefore(styleElem, head.firstChild);
      styleElem.media = 'print';
      styleElem.className = 'iepp-printshim';
      win.attachEvent(
        'onbeforeprint',
        iepp._beforePrint
      );
      win.attachEvent(
        'onafterprint',
        iepp._afterPrint
      );
    })(window, document);
}
//>>END IEPP

// Assign private properties to the return object with prefix
Modernizr._version      = version;

// expose these for the plugin API. Look in the source for how to join() them against your input
Modernizr._prefixes     = prefixes;
Modernizr._domPrefixes  = domPrefixes;

// Modernizr.mq tests a given media query, live against the current state of the window
// A few important notes:
//   * If a browser does not support media queries at all (eg. oldIE) the mq() will always return false
//   * A max-width or orientation query will be evaluated against the current state, which may change later.
//   * You must specify values. Eg. If you are testing support for the min-width media query use: 
//       Modernizr.mq('(min-width:0)')
// usage:
// Modernizr.mq('only screen and (max-width:768)')
Modernizr.mq            = testMediaQuery;   

// Modernizr.hasEvent() detects support for a given event, with an optional element to test on
// Modernizr.hasEvent('gesturestart', elem)
Modernizr.hasEvent      = isEventSupported; 

// Modernizr.testProp() investigates whether a given style property is recognized
// Note that the property names must be provided in the camelCase variant.
// Modernizr.testProp('pointerEvents')
Modernizr.testProp      = function(prop){
    return testProps([prop]);
};        

// Modernizr.testAllProps() investigates whether a given style property,
//   or any of its vendor-prefixed variants, is recognized
// Note that the property names must be provided in the camelCase variant.
// Modernizr.testAllProps('boxSizing')    
Modernizr.testAllProps  = testPropsAll;     

// Modernizr.testStyles() allows you to add custom styles to the document and test an element afterwards
// Modernizr.testStyles('#modernizr { position:absolute }', function(elem, rule){ ... })
Modernizr.testStyles    = injectElementWithStyles; 

// Modernizr.prefixed() returns the prefixed or nonprefixed property name variant of your input
// Modernizr.prefixed('boxSizing') // 'MozBoxSizing'

// Properties must be passed as dom-style camelcase, rather than `box-sizing` hypentated style.
// Return values will also be the camelCase variant, if you need to translate that to hypenated style use:
//
//     str.replace(/([A-Z])/g, function(str,m1){ return '-' + m1.toLowerCase(); }).replace(/^ms-/,'-ms-');

// If you're trying to ascertain which transition end event to bind to, you might do something like...
// 
//     var transEndEventNames = {
//       'WebkitTransition' : 'webkitTransitionEnd',
//       'MozTransition'    : 'transitionend',
//       'OTransition'      : 'oTransitionEnd',
//       'msTransition'     : 'msTransitionEnd', // maybe?
//       'transition'       : 'transitionEnd'
//     },
//     transEndEventName = transEndEventNames[ Modernizr.prefixed('transition') ];

Modernizr.prefixed      = function(prop){
  return testPropsAll(prop, 'pfx');
};

// Remove "no-js" class from <html> element, if it exists:
docElement.className = docElement.className.replace(/\bno-js\b/, '')

                        // Add the new classes to the <html> element.
                        + (enableClasses ? ' js ' + classes.join(' ') : '');

return Modernizr;

})(this, this.document);