js跳转到页头?
javascript或者jquery，在函数内，怎么样通过事件，来跳转到页面的页头。
fucntion top()
{
???
}
谢谢。
[解决办法]
lastScrollY = 0;
function heartBeat() {
var diffY;
if (document.documentElement && document.documentElement.scrollTop)
diffY = document.documentElement.scrollTop;
else if (document.body)
diffY = document.body.scrollTop;
else
{ /*Netscape stuff*/ }
percent = .1 * (diffY - lastScrollY);
if (percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
document.getElementById("web_ad").style.top = parseInt(document.getElementById("web_ad").style.top) + percent + "px";
lastScrollY = lastScrollY + percent;
if (lastScrollY > 0) {
document.getElementById("web_ad").style.display = "block";
} else {
document.getElementById("web_ad").style.display = "none";
}
}
suspendcode = "<DIV id="web_ad" style='right:100px;POSITION:absolute;TOP:630px; border:0px solid #ddd;display:none;'><a href='javascript:scroll(0,0)'><img src='/MarkTop.jpg' alt='返回顶部' /></a></div>";
document.write(suspendcode);
window.setInterval("heartBeat()", 1);
window.scroll(0,0)
