$(function () {

var sparkOptions = {
        type: 'bar'
        , height: '35px'
        , barWidth: '5px'
        , barSpacing: '2px'
};
$('#total-visits').sparkline(
        'html', $.extend (sparkOptions, { barColor: '#e5412d' })
);
$('#new-visits').sparkline(
        'html', $.extend (sparkOptions, { barColor: '#444' })
);
$('#unique-visits').sparkline(
        'html', $.extend (sparkOptions, { barColor: '#999' })
);
$('#revenue-visits').sparkline(
        'html', $.extend (sparkOptions, { barColor: '#5cb85c' })
);

});