function showMenu_portal(){
			var i;
			var menu_portalHome = document.getElementById("menu_portalHome");
			
			
			if(page == "portal home"){
				//make HOME button invisible on the homepage
				menu_portalHome.className = "menuItem";
			}
			
			if(!(page == "portal categories")){
				for (i = 1; i <= 10; i++){
					var elemName;
					elemName = "categories_0" + i;
					var elem = document.getElementById(elemName);
					elem.className = "menuItem";
				}
			}
			
			if(!(page == "participating schools" || page == "school view")){
				for (i = 1; i <= 10; i++){
					var elemName;
					elemName = "ps_0" + i;
					var elem = document.getElementById(elemName);
					elem.className = "menuItem";
				}
			}
		}