startList = function() {
		if ( document.getElementById ) {
		    //alert ('0');
			//navRoot = document.getElementById( "nav" );
			var navTR = document.getElementsByTagName("tr");;
			
			for(i=0;i<=navTR.length-1;i++) {
			    if (navTR[i].id) {
			        //alert ('2');
			        div_submenu = document.getElementById( "div_submenu_"+navTR[i].id );
			        
    		        navTR[i].onmouseover = function() {
    		            hide_submenus();
    		            div_submenu = document.getElementById( "div_submenu_"+this.id );
    		            
						if (div_submenu != null) {
    						div_submenu.style.display = 'block';
						}
					}
    					
			        if (div_submenu != null) {
    					div_submenu.onmouseout = function() {
    						if (!this.contains(event.toElement)) { this.style.display = 'none'; }
    					}
			        }
			    }
        	}
		}
	}
	window.onload = startList;
	
	function hide_submenus() {
	    var navTR = document.getElementsByTagName("tr");;
			
		for(i=0;i<=navTR.length-1;i++) {
		    if (navTR[i].id) {
		        //alert ('2');
		        div_submenu = document.getElementById( "div_submenu_"+navTR[i].id );
		        if (div_submenu != null) {
		            div_submenu.style.display = 'none';
		        }
		    }
    	}
	}