function alterna(tipo) {
				if (tipo == "cpanel") {
	     		document.getElementById("cpanel").style.display = "block";
	     		document.getElementById("webmail").style.display = "none";
				}
				else {
      		document.getElementById("cpanel").style.display = "none";
    			document.getElementById("webmail").style.display = "block";
    		}
			}