function preloadImages(){
	if (document.images){
	
		menu_1 = newImage("images/menu/imm_products_o.gif");
		menu_2 = newImage("images/menu/imm_about_o.gif");
		menu_3 = newImage("images/menu/imm_recipes_o.gif");
		preloadFlag = true;
	}
}

addEvent("onload", preloadImages);