// JavaScript Document

var isstarted = 0;

function doScroll(dir, amount) {
	
	var visibleHeight = parseInt(document.getElementById('parentlayer').style.height);
	var scrollDiv = document.getElementById('contentLayer').style;
	
	//alert(visibleHeight);
	
	if (isstarted == 1) { 
		
		if (dir == "dwn") {
			if ((parseInt(scrollDiv.top)+amount) > (visibleHeight-parseInt(scrollDiv.height))) {
				scrollDiv.top = (parseInt(scrollDiv.top)-amount)+"px";
				time1 = setTimeout("doScroll('" + dir + "',"+ amount +");", 5);
			} else{
				stopScroll();
			}
		}
		if (dir == "up") {
			if ((parseInt(scrollDiv.top)+amount) < amount) {
				scrollDiv.top = parseInt(scrollDiv.top)+amount+"px";
				time1 = setTimeout("doScroll('" + dir + "',"+ amount +");", 5);
			} else{
				stopScroll();
			}
		}
	}
}

function startScroll(dir, amount) {
	isstarted = 1;
	doScroll(dir, amount);
}


function stopScroll() {
	isstarted = 0;
}


function on(img,lan){ 
	if(document.images)
	{
		if(lan != null){
			var image = "/graphics/" + lan + "/" + img + "_on.gif";
		}else{
			var image = "/graphics/" + img + "_on.gif";
		}
		document.images[img].src= image;
		return true;
	}
}

function off(img,lan){ 
	if(document.images)
	{
		if(lan != null){
			var image = "/graphics/" + lan + "/" + img + "_off.gif";
		}else{
			var image = "/graphics/" + img + "_off.gif";
		}
		document.images[img].src= image;
		return true;
	}
}