function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		products_over = newImage("images/products-over.jpg");
		about_over = newImage("images/about-over.jpg");
		links_over = newImage("images/links-over.jpg");
		contact_over = newImage("images/contact-over.jpg");
		home_over = newImage("images/home-over.jpg");
		preloadFlag = true;
	}
}
function winpage(URL) { 
   swidth = (screen.width-700)/2;
   sheight = (screen.availHeight-450)/2;
   sheight = (screen.height <= "600") ? 0 : sheight;
   var newWinpage = window.open(URL,'newWinpage','width=700,height=450,top=' + sheight + ',left=' + swidth + ',resizable=yes,scrollbars=yes,toolbar=no');
   newWinpage.focus();}