//<!--
function VerificarForm() {
  if(document.contactform.nom.value == "") {
    window.alert("Who are you?.");
    document.contactform.nom.focus();
    return false;
  }

  if(document.contactform.email.value == "") {
    window.alert("Please tell me your email.");
    document.contactform.email.focus();
    return false;
  }
  var controlemail=document.contactform.email.value;
  //window.alert(controlemail.indexOf("@"));
  if (controlemail.indexOf("@") == -1){
  	window.alert("This is not a correct mail address");
   document.contactform.email.focus(); 	
   return false;
  }
  if(document.contactform.tel.value == "") {
    window.alert("Please, send me a phone number.");
    document.contactform.tel.focus();
    return false;
  }  
  return true;
}
//-->