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

function validate_form(thisform)
{
	if (validate_required(thisform.Name,"Your name must be filled out!") === false)
  		{
  		thisform.Name.focus();
  		return false;
  		}
	else if (validate_required(thisform.Email,"Your email address must be filled out!") === false)
		{
		thisform.Email.focus();
		return false;
		}
	else if (validate_required(thisform.Address,"Your address must be filled out!") === false)
  		{
  		thisform.Address.focus();
  		return false;
  		}
	else if (validate_required(thisform.Message,"A message must be entered!") === false)
		{
		thisform.Message.focus();
		return false;
		}
}