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) {
		menu_home_over = newImage("images/menu_home-over.gif");
		menu_home_down = newImage("images/menu_home-down.gif");
		menu_products_over = newImage("images/menu_products-over.gif");
		menu_products_down = newImage("images/menu_products-down.gif");
		menu_solutions_over = newImage("images/menu_solutions-over.gif");
		menu_solutions_down = newImage("images/menu_solutions-down.gif");
		menu_support_over = newImage("images/menu_support-over.gif");
		menu_support_down = newImage("images/menu_support-down.gif");
		menu_downloads_over = newImage("images/menu_downloads-over.gif");
		menu_downloads_down = newImage("images/menu_downloads-down.gif");
		menu_aboutus_over = newImage("images/menu_aboutus-over.gif");
		menu_aboutus_down = newImage("images/menu_aboutus-down.gif");
		menu_line_menu_home_over = newImage("images/menu_line-menu_home_over.gif");
		menu_line_menu_home_down = newImage("images/menu_line-menu_home_down.gif");
		preloadFlag = true;
	}
}