Unnamed

Hi, I am a php programmer starting to get into javascript quite a bit more. 

I am having an issue understanding some basics. 

i have the following. I am using mootools for my framework. my problem seems to be that both my validator and my asynchronous request run off the submit action for the form. So i believe my problem to be even propagation. I need to check if my form is valid, and if true then continue on with the submit request. However I have no idea how to do this in javascript. 

I have alerted out my validator function that will return a true/false depending on if my form is valid or not. I do not know how to arrange my script below to do an if true then continue. 

<script type="text/javascript">
// start form validator
var myValidator = new fValidator("create_category_form"); 


//add submit event.
$('create_category_form').addEvent('submit', function(e) {
	new Event(e).stop();
        
        alert(myValidator. _checkSubmit());

	$('log').setStyle('display', 'none');
	$('log_res').setStyle('display', 'block');

	this.send({
		onComplete: function() {
			$('log_res').setStyle('display', 'none');
			$('success').setStyle('display', 'block');
		}
	});
});
</script>