wf.functionName_formValidation = "myCustomValidation";
function myCustomValidation (evt) {
if(wf.formValidation(evt)) new Ajax.Updater('result', '/inc/processrequest.php',{onLoading:function(request){sendmail()},onComplete:function(request){handelrequest()},parameters:Form.serialize(document.forms['contact_form']), insertion:Insertion.Bottom, asynchronous:true});
return wf.utilities.XBrowserPreventEventDefault(evt);
}