jquery 插件页面回到顶部

$.scrollUp({
scrollName: 'scrollUp', // Element ID
topDistance: '300', // Distance from top before showing element (px)
topSpeed: 300, // Speed back to top (ms)
animation: 'fade', // Fade, slide, none
animationInSpeed: 200, // Animation in speed (ms)
animationOutSpeed: 200, // Animation out speed (ms)
scrollText: '', // Text for element
activeOverlay: false // Set CSS color to display scrollUp active point, e.g '#00FFFF'
});

<a id="scrollUp" href="#top" title="" style="position: fixed; z-index: 2147483647;
display: block;"></a>

#scrollUp
{
bottom: 20px;
right: 20px;
height: 38px;
width: 38px;
background: url("../../../images/top.png") no-repeat;
}