function swap(img,over)
{
	//alert(img)
	var image=document.getElementById(img)
	//var image=source1.firstChild
	var source=image.src
	var sourcenew=""
	if(over && source.substr(source.length-6,2)!="_u")
	{
		sourcenew=source.substr(0,source.length-4)+"_u"+source.substr(source.length-4,4)
		image.setAttribute("src",sourcenew);	
	}
	else if (!over && source.substr(source.length-6,2)=="_u")
	{
		sourcenew=source.substr(0,source.length-6)+source.substr(source.length-4,4)
		image.src=sourcenew;
	}
}