// JavaScript Document
		var classname = "className";
		if (navigator.appName == "Netscape") classname = "class";

		function show_submenu(target_id, button) {
			var target_submenu = document.getElementById('catalog_submenu_'+target_id);
			if (target_submenu.style.display == 'none') {
				target_submenu.style.display = 'block';
				button.setAttribute(classname,"active");
			} else {
				target_submenu.style.display = 'none';
				button.setAttribute(classname,"");
			}
		}