function imageChange(target)
{
	if(target.src.indexOf("_off") > -1)
		target.src = target.src.replace("_off","_on");
	else
		target.src = target.src.replace("_on","_off");
}

var scrollSpeed = 14;
var scrollTimer;

function scrollUp()
{
	scrollMoveUp(200);
}

function scrollDown()
{
	scrollMoveDown(200);
}

function scrollMoveUp(timer)
{
	if((Number(document.getElementById("scrollLayerInnerDiv").style.marginTop.replace("px","").replace("pt","")) - scrollSpeed) > ((document.getElementById("scrollLayerInnerDiv").clientHeight  - 477) * -1)) 
		document.getElementById("scrollLayerInnerDiv").style.marginTop = Number((document.getElementById("scrollLayerInnerDiv").style.marginTop).replace("px","").replace("pt","")) - scrollSpeed;
	else
		document.getElementById("scrollLayerInnerDiv").style.marginTop = (document.getElementById("scrollLayerInnerDiv").clientHeight  - 477) * -1;
	
	if(Number(timer) <= 40)
		timer = 60;

	scrollTimer = setTimeout("scrollMoveUp(" + (Number(timer) - 20) + ")", (Number(timer) - 20));
}

function scrollMoveDown(timer)
{
	if(Number(document.getElementById("scrollLayerInnerDiv").style.marginTop.replace("px","").replace("pt","")) + scrollSpeed < 0)
		document.getElementById("scrollLayerInnerDiv").style.marginTop = Number(String(document.getElementById("scrollLayerInnerDiv").style.marginTop).replace("px","").replace("pt","")) + scrollSpeed;
	else
		document.getElementById("scrollLayerInnerDiv").style.marginTop = 0;
	
	if(Number(timer) <= 40)
		timer = 60;
	
	scrollTimer = setTimeout("scrollMoveDown(" + (Number(timer) - 20) + ")",  (Number(timer) - 20));
}

function scrollStop()
{
	clearTimeout(scrollTimer);
}