<form id="form1" backendurl="/path/backend.php" resulthandler="ThisJavaScriptFunction(result)">

$(document).ready(function() {
$("form").submit(function(event) {
    // i would love to attach a result handler to a form, but this seems not to work
    // var form = event["currentTarget"];
    // var ResultHandler = $(form).attr("resulthandler"); // needs to be defined as property of form, example: <form id="NewsletterForm" novalidate="novalidate" backendurl="/newsletter_subscribe_backend.php">
    validateAndSubmit(this,null,event);
}