AbstractDefaultAjaxBehavior doesn't work when added directly to page

The AbstractDefaultAjaxBehavior will generate an invalid wicketAjaxGet call when it is added directly to a Page.

function openAutomatischeMaatregelWindow() {
var wcall=wicketAjaxGet('../../?wicket:interface=:4::IBehaviorListener:1:2',null,null, function()

.bind(this));
}

the Wicket.$('id438') doesn't exist.