function validateForm(form)
{
  if (form.name.value == "")  
  {
   alert("Please enter your name.");  
   form.name.focus();  
   return false; 
  }
  if (form.email.value == "")  
  {
   alert("Please enter your email address.");  
   form.email.focus();  
   return false; 
  }
}