网页设计在线

这段代码如下所示：
</head>
<Script language=javascript>
var currentpos,timer;
function initialize() {
timer=setInterval("scrollwindow()",16);
}
function sc(){
clearInterval(timer);
}
function scrollwindow() {
currentpos=document.body.scrollTop;
window.scroll(0,++currentpos);
if (currentpos != document.body.scrollTop)
sc();
}
document.onmousedown=sc
document.ondblclick=initialize
document.ondblclick=initialize
</Script>