userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 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 && (preloadFlag == 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];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		windows_top_over = newImage("images/windows_top-over.jpg");
		siding_top_over = newImage("images/siding_top-over.jpg");
		insulation_top_over = newImage("images/insulation_top-over.jpg");
		about_over = newImage("images/about-over.gif");
		quality_over = newImage("images/quality-over.gif");
		maintenence_over = newImage("images/maintenence-over.gif");
		performance_over = newImage("images/performance-over.gif");
		windowstyles_over = newImage("images/windowstyles-over.gif");
		glossary_over = newImage("images/glossary-over.gif");
		warranty_over = newImage("images/warranty-over.gif");
		contactus_over = newImage("images/contactus-over.gif");
		sitemap_over = newImage("images/sitemap-over.gif");
		energytax_over = newImage("images/energytax-over.gif");
		siding_over = newImage("images/siding-over.gif");
		insulation_over = newImage("images/insulation-over.gif");
		featured_over = newImage("images/featured-over.gif");
		solidcore_over = newImage("images/solidcore-over.gif");
		vinyl_over = newImage("images/vinyl-over.gif");
		sidinggallery_over = newImage("images/sidinggallery-over.gif");
		faqs_over = newImage("images/faqs-over.gif");
		techinfo_over = newImage("images/techinfo-over.gif");
		sidingwarranty_over = newImage("images/sidingwarranty-over.gif");
		contactus_over = newImage("images/contactus-over.gif");
		sitemap_over = newImage("images/sitemap-over.gif");
		windows_over = newImage("images/windows-over.gif");
		insulation_aa_over = newImage("images/insulation_aa-over.gif");
		siding_over = newImage("images/siding-over.gif");
		premiumblowingwool_over = newImage("images/premiumblowingwool-over.gif");
		insulationwarranty_over = newImage("images/insulationwarranty-over.gif");
		insulationtaxcredits_over = newImage("images/insulationtaxcredits-over.gif");
		conactus_b_over = newImage("images/conactus_b-over.gif");
		sitemap_b_over = newImage("images/sitemap_b-over.gif");
		windows_b_over = newImage("images/windows_b-over.gif");
		siding_b_over = newImage("images/siding_b-over.gif");
		featured_b_over = newImage("images/featured_b-over.gif");
		about2_over = newImage("images/about2-over.gif");
		welcome_over = newImage("images/welcome-over.gif");		
		preloadFlag = true;
	}
}