function ValidateForm ( ) { 
  if (document.getElementById("LoginID").value == "Username") {
    alert('Username is required');
    return false;
  }
  if (document.getElementById("LoginID").value <= "     ") {
    alert('Username required');
    return false;
  }
  if (document.getElementById("realpass").value <= "     ") {
    alert('Password is required');
    return false;
  }
  return true;
}