function scrolltop() {
	var aTagList = document.getElementsByTagName('a');
	for (var i = 0; i < aTagList.length; i++) {
		if (aTagList[i].href.match(/#top/i)) {
			aTagList[i].onclick = PageTop;
		}
	}
}
var TopMove = 20; 
var TopPosi;
function PageTop() { 
	var yPos = document.body.scrollTop || document.documentElement.scrollTop;
	mObj(yPos);
	return false;
}
function mObj(y, s) { 
	if (s) TopMove = s;
	TopPosi = parseInt(y - y * 2 / TopMove);
	scrollTo(0, TopPosi);
	if (TopPosi > 0) setTimeout('mObj(TopPosi, TopMove)', 1);
}
if (window.addEventListener) window.addEventListener('load', scrolltop, false);
if (window.attachEvent) window.attachEvent('onload', scrolltop);