function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}

function validate_form(thisform)
{
with (thisform)
  {
  	if (validate_required(FirstName,"First Name Is Required !")==false)
  	{FirstName.focus();return false;}
	else if (validate_required(LastName,"Last Name Is Required !")==false)
  	{LastName.focus();return false;}
	else if (validate_required(email,"E-mail Is Required !")==false)
  	{email.focus();return false;}

  }
}