//Javascript Document
	function validar(){
	n=document.getElementById("txt_nombre").value;
	a=document.getElementById("txt_apellido").value;
	m=document.getElementById("txt_mail").value;
	
	if(n==''||a==''|| m==''){
		alert("Falta completar campo obligatorio");

			}else{
			document.frmSus.submit();	
		}	
	}