function subm(){
$$('td.red').invoke('removeClassName','red');

$('bookingrequest').request({
  onComplete: function(transport){ 
  
  if(transport.responseText.startsWith('error')){
  $("notification").update("<span class='red'>Not all required fields are correct. Your request has not been sent. <br />Please check all fields marked in red and try again.</span>");
  var error= eval(transport.responseText);
  error.each(function(value) { 
$(value).addClassName("red");
})
} else { $("content").update(transport.responseText);  $("notification").update(""); }
 }
})

}