function navRollover(){
	if(document.getElementsByTagName){
		var images = document.getElementsByTagName("img");
		var bodyId = document.getElementsByTagName("body")[0].id;
		var navMenu = new Array();
		
		for(var i=0; i < images.length; i++){
			
			if(images[i].getAttribute("src").match("nav_")){
				navMenu[i] = new Image();
				navMenu[i].src = images[i].src.replace(".gif", "_over.gif");
				var navName = navMenu[i].src.match(/nav_[a-z]*/);
				
				if("nav_" + bodyId == navName){
					var listName = "N" + bodyId;
					var currentList = document.getElementById(listName);
					currentList.src = currentList.src.replace(".gif", "_over.gif");
					}
				else{
					images[i].onmouseover = function(){
								this.setAttribute("src", this.getAttribute("src").replace(".gif", "_over.gif"));
					}
					images[i].onmouseout = function(){
								this.setAttribute("src", this.getAttribute("src").replace("_over.gif", ".gif"));
					}
				}
			}
		}
	}
}


if(window.addEventListener){
	window.addEventListener("load", navRollover, false);
}
else if(window.attachEvent){
	window.attachEvent("onload", navRollover);
}