if(!window.JS)
	JS=new Object();

JS.RolloverObjects=new Array();

JS.Rollover = function(name, img)
{
	JS.RolloverObjects[name]= new Image();
	JS.RolloverObjects[name].img_src = img;	
	if(!JS.Rollover.postLoad)
		JS.RolloverObjects[name].src = img;
}
JS.Rollover.postLoad = false;
JS.Rollover.loadImages = function()
{
	var i;
	for(i in JS.RolloverObjects)
	{
		r=JS.RolloverObjects[i];
		r.src=r.img_src;
	}
}

JS.findImg = function(n) 
{
	var img = JS.getImg(n, document);

	
	return img;
}
JS.getImg = function(n, d) 
{
	var img = d.images[n];

	if(!img && d.layers)  
		for(var i=0 ; !img && i<d.layers.length ; i++) 
			img=JS.getImg(n,d.layers[i].document);

	return img;
}
JS.imgOn = function(imgName, rollName)
{
	if(rollName == null)
		rollName=imgName;


	if(!JS.RolloverObjects[rollName])
	{
		JS.Rollover.error(rollName);
		return;
	}
	var img = JS.findImg(imgName);
	if(img.offSrc==null)
		img.offSrc=img.src;
	img.src=JS.RolloverObjects[rollName].img_src;
}
JS.imgOff = function(imgName)
{
	var img = JS.findImg(imgName);
	img.src=img.offSrc;
}


	JS.Rollover("arrow_img",   "http://www.wgtop.ch/Site/www_wgtop_de/ModuleData/HtmlModule/Images/Pfeil_navi.jpg");