function validateEmail(field) 
{
  //Validating the email field
   var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
   if (! field.value.match(re)) {
       alert("Invalid email address");
       field.focus();
       field.select();
       return (false);
   }
   return(true);
}