function check_required(field)
{
  with(field)
  {
    if( name == "email" )
    {
      if( value.indexOf("@") < 1 )
        return false;
    }
    else
    {
      if(value == null || value == "")
        return false;
    }
    return true;
  }
}

function check_Form(thisform)
{
  var datastring = "";
  with(thisform)
  {
    var name_chk = check_required(name);
    var email_chk = check_required(email);
    var enq_chk = check_required(query);
  
    datastring += "name=" + name.value;
    datastring += "&email=" + email.value;
    datastring += "&make=" + make.value;
    datastring += "&model=" + model.value;
    datastring += "&year=" + year.value;
    datastring += "&chasis=" + chasis.value;
    datastring += "&engine=" + engine.value;
    datastring += "&cap=" + cap.value;
    datastring += "&query=" + query.value;
    datastring += "&phone=" + phone.value;
  }

  if( name_chk == false || email_chk == false || enq_chk == false )
  {
    var alert_text = "Please check the following required fields:  \n";

    if( name_chk == false ) { alert_text += " * Name\n"; }
    if( email_chk == false ) { alert_text += " * Email\n"; }
    if( enq_chk == false ) { alert_text += " * Enquiry\n"; }

    alert (alert_text);

    return false;
  }
  
  $.ajax({
    type: "POST",
    url: "./script_functions/insert_enquiry.php",
    data: datastring,
    success: function(msg,status) { 
    }
  });

  return true;
}