/**
 * Navigation Routines
 */
			// menu code
			var timer;
			var lastmenu;
		
			function show_subnav(nav_name){
		
				//clear previous menu item
				window.clearTimeout(timer);
				hide_last_subnav();
		
				//show current menu item
				var n = document.getElementById(nav_name);
				n.style['visibility'] = 'visible';
				lastmenu = nav_name;
			}
			function show_subnavnohide(nav_name){
		
				//clear previous menu item
				window.clearTimeout(timer);
		
				//show current menu item
				var n = document.getElementById(nav_name);
				n.style['visibility'] = 'visible';
			}
			function hide_last_subnav(){
				if(lastmenu){
					hide_subnav(lastmenu);
				}	
			}
			function hide_subnav(nav_name){
				var n = document.getElementById(nav_name);
				n.style['visibility'] = 'hidden';

			}
			function hide_subsubnav(nav_name){
				var n = document.getElementById(nav_name);
				n.style['visibility'] = 'hidden';

				time_subnav('products_menu');
			}
			function time_subnav(nav_name){
				timer = window.setTimeout('hide_subnav("' + nav_name + '")', 500);	
			}
			function keep_subnav(){
				window.clearTimeout(timer);	
			}