function SimpleSwap(el,which){
	el.src=el.getAttribute(which || "origsrc");
}

function SimpleSwapSetup(){
	var x = document.getElementsByTagName("img");
	for (var i=0;i<x.length;i++){
		var oversrc = x[i].getAttribute("oversrc");
			if (!oversrc) continue;
		  
			x[i].oversrc_img = new Image();
			x[i].oversrc_img.src=oversrc;
			x[i].onmouseover = new Function("SimpleSwap(this,'oversrc');");
			x[i].onmouseout = new Function("SimpleSwap(this);");
			x[i].setAttribute("origsrc",x[i].src);
	}
}

var PreSimpleSwapOnload =(window.onload)? window.onload : function(){};
window.onload = function(){PreSimpleSwapOnload(); SimpleSwapSetup();}