function validate()
{ 
  if (document.forms["Hamper"]["full_name"].value == "") 
  {
    alert('Please enter your name');
    return false;
   }
  if (document.forms["Hamper"]["practice_name"].value == "") 
  {
    alert('Please enter practice name');
    return false;
   }

  if (document.forms["Hamper"]["phone"].value == "") 
  {
    alert('Please enter phone number');
    document.forms["Hamper"]["phone"].focus;
    return false;
   }
   
   if (document.forms["Hamper"]["email"].value == "") 
  {
    alert('Please enter email');
    return false;
  }
}