//------------------------------------------------
// Navigation Rollover Code
//------------------------------------------------
	
	var flag = false;
	
	function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}
	
	function init() {
	//image swapping - on-images
		if (document.images) {
			nav_home_up = newImage("/img/nav_home.jpg");
			nav_home_over = newImage("/img/nav_home_over.jpg");
			nav_about_up = newImage("/img/nav_about.jpg");
			nav_about_over = newImage("/img/nav_about_over.jpg");
			nav_services_up = newImage("/img/nav_services.jpg");
			nav_services_over = newImage("/img/nav_services_over.jpg");
			nav_projects_up = newImage("/img/nav_projects.jpg");
			nav_projects_over = newImage("/img/nav_projects_over.jpg");
			nav_subcon_up = newImage("/img/nav_subcon.jpg");
			nav_subcon_over = newImage("/img/nav_subcon_over.jpg");
			nav_careers_up = newImage("/img/nav_careers.jpg");
			nav_careers_over = newImage("/img/nav_careers_over.jpg");
			nav_contact_up = newImage("/img/nav_contact.jpg");
			nav_contact_over = newImage("/img/nav_contact_over.jpg");
			return (flag = true);  
		}		
	}
	
	function findElement(n,ly) {
		if (browserVersion < 4)		return document[n];
		var curDoc = ly ? ly.document : document;
		var elem = curDoc[n];
		if (!elem) {
			for (var i=0;i<curDoc.layers.length;i++) {
				elem = findElement(n,curDoc.layers[i]);
				if (elem) return elem;
			}
		}
		return elem;
	}
	
	function changeImages() {
		if (document.images && (flag == true)) {
			var img;
			for (var i=0; i<changeImages.arguments.length; i+=2) {
				img = null;
				if (document.layers) {
					img = findElement(changeImages.arguments[i],0);
				}
				else {
					img = document.images[changeImages.arguments[i]];
				}
				if (img) {
					img.src = changeImages.arguments[i+1].src;
				}
			}
		}
	}

	window.onload = init;