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(name,"Your name must be filled out.")==false)
  {name.focus();return false;}
  else if (validate_required(email,"Your email must be included.")==false)
    {email.focus();return false;}
  else if (validate_required(message,"A message must be included.")==false)
    {message.focus();return false;}
  else { alert("Your message has been sent."); }
  }
}