var botoes = new Object();
		botoes = ["o-que-e","seguranca","lixo-eletronico","ensinando-com-a-web","glossario"];
	
		function showMenu(id){
			if(id==''){
				document.getElementById('submenu').style.display='none';
				for (var i in botoes){
					document.getElementById(botoes[i]).style.display='';
				}
			}
			else{
				//document.getElementById('submenu').style.display='none';
				for (var i in botoes){
					document.getElementById(botoes[i]).style.display='';
				}
				if(document.getElementById(id).style.display!='block'){
				   document.getElementById('submenu').style.display='block';
				   document.getElementById('submenu').style.width='200px';
				   for (var i in botoes){
						if(botoes[i]!=id){
							document.getElementById(botoes[i]).style.display='none';
						}
				   }
				}
			}
		}
		
		function hideMenu(id){
			if(document.getElementById(id).style.display!='none'){
			   document.getElementById(id).style.display='none';
			}
		}
		
		function hideMenuAll(x){
			var t = setTimeout("document.getElementById('submenu').style.display='none'",x);
		}