[Moo] An ajax request before default form submition?

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Hi!

actual a simple thing?
I need to setup an ajax-request before default form submition.. it's
possible?

here my code example:

<form id="myform" action="https://paypal.com/.."; method="post">
<input type="text" name="test" value="" />
<input type="submit" value="Send" id="send-button" />
</form>

<script>
window.addEvent('domready', function() {
                $(send-button').addEvent('click',function(event){
                        var myRequest = new Request({async: true, url:
'/ajax-target.html}).send();
                        // nothing happens here :(
               });
});
</script>

Thank you!