var isIE = (navigator.appName == "Microsoft Internet Explorer");
var isNS = (document.all==null)
var lastScrollX2 = 0; lastScrollY2 = 0;
var scrollSpeed=30;		//捲動速度
var floatingID = "floating"; //浮水印ID
var marginTop = 250;
	
function UpdateAd() {
	var newY = ((document.documentElement.scrollTop)+marginTop)+"px";
	document.getElementById(floatingID).style.top=newY;
	window.setInterval("RollAd2()",1);
}
function RollAd2() {
	if (window.document.body.clientWidth < 1024) {
		document.getElementById(floatingID).style.display="none";
	}
	else {
		document.getElementById(floatingID).style.display="block";
	}
	
	if(isIE){ 
		diffY = window.document.getElementsByTagName("html")[0].scrollTop; 
		diffX = 0; 
	}
	
	if(isNS){ 
		diffY = self.pageYOffset; 
		diffX = 0; 
	}
	if (document.getElementById(floatingID).style.visibility!="hidden"){
		if(diffY != lastScrollY2){
			percent = 1 * (diffY - lastScrollY2) / scrollSpeed;
			if(percent > 0) percent = Math.ceil(percent);
			else percent = Math.floor(percent);
			newY=parseInt(document.getElementById(floatingID).style.top);
			newY+=percent;
			document.getElementById(floatingID).style.top = newY+"px";
			lastScrollY2 += percent;
			window.status='Y:'+ diffY;
		}
	}
}

UpdateAd() ;