function validar(Ctrl, Mensaje)
{
  alert(Mensaje);
  Ctrl.focus();
  return;
}

function es_email(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validacionForm() {

 todo_ok=true;

 if(document.forms['form1'].name.value=="" && todo_ok) {
    validar(document.forms['form1'].name, "Name is required.")
    todo_ok=false;
 }
 
 if(document.forms['form1'].surname.value=="" && todo_ok) {
    validar(document.forms['form1'].surname, "Surname is required.")
    todo_ok=false;
 }
 
 if(document.forms['form1'].telephone.value=="" && todo_ok) {
    validar(document.forms['form1'].telephone, "Telephone is required.")
    todo_ok=false;
 }
 
 if(document.forms['form1'].mobile.value=="" && todo_ok) {
    validar(document.forms['form1'].mobile, "Mobile is required.")
    todo_ok=false;
 }
 
 if(document.forms['form1'].address.value=="" && todo_ok) {
    validar(document.forms['form1'].address, "Address is required.")
    todo_ok=false;
 }
 
 if(document.forms['form1'].email.value=="" && todo_ok) {
    validar(document.forms['form1'].email, "Email is required.")
    todo_ok=false;
 }
 
 if(document.forms['form1'].time_arrival.value=="" && todo_ok) {
    validar(document.forms['form1'].time_arrival, "Time of arrival is required.")
    todo_ok=false;
 }

 if(document.forms['form1'].time_departure.value=="" && todo_ok) {
    validar(document.forms['form1'].time_departure, "Time ofdeparture is required.")
    todo_ok=false;
 }
 
 

 if (todo_ok==true) document.forms['form1'].submit();

}