var ns4=(document.layers)?true:false;
var ie4up=(document.all)?true:false;
var ns5up=(document.getElementById && !ie4up)?true:false;

function cacheImgs(){
	cached = new Array();
	for (var i=1;i<arguments.length;i++){
		cached[i]=new Image();
		cached[i].src = arguments[0] + arguments[i];
	}
}
	
function imgSwap(nom,pik){
	var end_path;
	var image_path;
	end_path=document[nom].src.lastIndexOf('/') + 1;
	image_path=document[nom].src.substring(0,end_path);
	document[nom].src = image_path + pik;
}