// 

isIE = document.all;            
isN6 = document.getElementById;
isN4 = document.layers;         
myObj = "";                     

//	var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
//	var Win = navigator.appVersion.indexOf('Win',0) != -1;
//	var IE  = navigator.appName.indexOf("Microsoft Internet Explorer",0) != -1;
//	var NN  = navigator.appName.indexOf("Netscape",0) != -1;
//	var Moz = navigator.userAgent.indexOf("Gecko") != -1;
//	var Vmajor = parseInt(navigator.appVersion); // ex. 3
//	var Vminor = parseFloat(navigator.appVersion); // ex. 3.01

//	var MacIE4 = ((Mac && navigator.appVersion.indexOf('MSIE 4.',0) != -1));
//	var MacIE3 = ((Mac && navigator.appVersion.indexOf('MSIE 3.',0) != -1));

function CurrLeft() {
	if (isIE) {
		if(document.compatMode){
			return document.documentElement.scrollLeft;
		}else{
			return document.body.scrollLeft;
		}
	} else if (window.pageXOffset) {
		return window.pageXOffset;
	} else {
		return 0;
	}
}

function CurrTop() {
	if (isIE) {
		if(document.compatMode=="CSS1Compat"){
			return document.documentElement.scrollTop;
		}else{
			return document.body.scrollTop;
		}
	} else if (window.pageYOffset) {
		return window.pageYOffset;
	} else {
		return 0;
	}
}

var clock;
var currX;
var currY;
var unittime = 2;

function gotop(toX, toY, breaking) {
	if (clock) clearTimeout(clock);

	if (!toX || toX < 0)	{toX = 0;}
	if (!toY || toY < 0)	{toY = 0;}
	if (!currX)	{currX = CurrLeft();}
	if (!currY)	{currY = CurrTop();}
	if (!breaking)	{breaking = 5;}

	currX += (toX - CurrLeft()) / breaking;
	if (currX < 0) {currX = 0;}
	currY += (toY - CurrTop()) / breaking;
	if (currY < 0) {currY = 0;}

	currX = Math.floor(currX);
	currY = Math.floor(currY);
	window.scrollTo(currX, currY);

	if (currX != toX || currY != toY) {

		clock = setTimeout("gotop(" + toX + "," + toY + "," + breaking + ")", unittime);
	}
}

function runTop() {
	gotop(0, 0, 10);
}

/* go top function */
function setPageTop(){
	if(!document.getElementsByTagName) return false;
	var pageTopList = document.getElementsByTagName("img");
	for(var i=0;i<pageTopList.length;i++){
		if(pageTopList[i].className.match("pagetop")){
			pageTopList[i].onclick = function(){
				runTop();
				return false;
			}
		}
	}
}