// JavaScript Document

var position = 0;
var color = "#ffffff";

function setID() {
	
	var divCollection = document.getElementsByTagName("img");
	
	for (var i=0; i<divCollection.length; i++) {
	
		if (divCollection[i].className == 'img_up') {
		divCollection[i].setAttribute('id', 'u' + i);
		
		}
		else if (divCollection[i].className == 'img_down') {
		divCollection[i].setAttribute('id', 'd' + i);
		
		}
	
	}
}

 
function startPolling(){setInterval(poll,5)}
 
function poll(){
if (navigator.appName == "Microsoft Internet Explorer"){
	
	var position = document.body.scrollTop;
	
}
else {var position = window.pageYOffset;}

var divCollection = document.getElementsByTagName("img");

for (var i=0; i<divCollection.length; i++) {
	
	var checker = 'u' + i;
	
	if (document.getElementById(checker)) {
		
			
			var iReturnValue = 0;
			elementid=document.getElementById(checker)
			while( elementid != null ){
				iReturnValue += elementid.offsetTop;
				elementid = elementid.offsetParent;
			}
			
			var condense = (position + 300)/iReturnValue * 100;
			
			var winHeight = document.documentElement.clientHeight;
			
			var totalScroll = document.body.scrollHeight;
			
			var elscroll = iReturnValue - position;
			
			var elPerc = (iReturnValue - position) / document.documentElement.clientHeight;
			
			var elSize = Math.round(elPerc * 10) * 2;
			
			if (elSize < 0) {
				var elSize = 0;
			}
			else if (elSize > 10) {
				var elSize = 10;
			}
		
			
			document.getElementById(checker).setAttribute ("height", elSize);
			
	
	}
	
	var checker = 'd' + i;
	
	if (document.getElementById(checker)) {
		
			
			var iReturnValue = 0;
			elementid=document.getElementById(checker)
			while( elementid != null ){
				iReturnValue += elementid.offsetTop;
				elementid = elementid.offsetParent;
			}
			
			var condense = (position + 300)/iReturnValue * 100;
			
			var winHeight = document.documentElement.clientHeight;
			
			var totalScroll = document.body.scrollHeight;
			
			var elscroll = iReturnValue - position;
			
			var elPerc = (iReturnValue - position) / document.documentElement.clientHeight;
			
			var elSize = (10 - Math.round(elPerc * 10)) * 2;
			
			if (elSize < 0) {
				var elSize = 0;
			}
			else if (elSize > 10) {
				var elSize = 10;
			}
		
			
			document.getElementById(checker).setAttribute ("height", elSize);
			
	
	}
	
}

 
document.bgColor = color;
return true;
 
}