//preload some images
	
	
	
	var myImage = new Image;
	myImage.src = "../images/nav/about_over.gif";
	myImage.src = "../images/nav/contact_over.gif";
	myImage.src = "../images/nav/home_over.gif";
	myImage.src = "../images/nav/news_over.gif";
	myImage.src = "../images/nav/products_over.gif";
	myImage.src = "../images/nav/services_over.gif";
	myImage.src = "images/nav/about_over.gif";
	myImage.src = "images/nav/contact_over.gif";
	myImage.src = "images/nav/home_over.gif";
	myImage.src = "images/nav/news_over.gif";
	myImage.src = "images/nav/products_over.gif";
	myImage.src = "images/nav/services_over.gif";


	function nav_on(linkid){
	
		a = document.getElementById(linkid);
		if (a.className != 'selected'){
			img = a.firstChild;
			
			newsrc = linkid.replace("top_","");
			newsrc = newsrc.replace("_link","");
			newsrc = "images/nav/" + newsrc + "_over.gif";
			img.src = newsrc;
		}
	}
	function nav_off(linkid){
		a = document.getElementById(linkid);
		if (a.className != 'selected'){
			img = a.firstChild;
			
			newsrc = linkid.replace("top_","");
			newsrc = newsrc.replace("_link","");
			newsrc = "images/nav/" + newsrc + "_off.gif";
			img.src = newsrc;
		}
	}