function validaForm()
{
	ctl=document.forms[0].email;
	valor=ctl.value;
	 if (valor == "" || valor == null || !isNaN(valor) || valor.charAt(0) == ' ')
    {
    alert("Debe rellenar el Campo Email");
    ctl.focus();
    return false;
    }
    if (! isValidEmail())
    {
    	alert("El Campo Email no es correcto");
    	ctl.focus();
    	return false;
    }	
}

function isValidEmail(strEmail){
  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
  strEmail = document.forms[0].email.value;

   // search email text for regular exp matches
   if (strEmail.search(validRegExp) == -1) 
   {
      return false;
   } 
    return true; 
}

function validaFormEng()
{
	ctl=document.forms[0].email;
	valor=ctl.value;
	 if (valor == "" || valor == null || !isNaN(valor) || valor.charAt(0) == ' ')
    {
    alert("Email field is mandatory");
    ctl.focus();
    return false;
    }
    if (! isValidEmail())
    {
    	alert("Email field is wrong");
    	ctl.focus();
    	return false;
    }	
}

function validaFormFr()
{
	ctl=document.forms[0].email;
	valor=ctl.value;
	 if (valor == "" || valor == null || !isNaN(valor) || valor.charAt(0) == ' ')
    {
    alert("champs obligatoire");
    ctl.focus();
    return false;
    }
    if (! isValidEmail())
    {
    	alert("l'information est erronée");
    	ctl.focus();
    	return false;
    }	
}