Błędy w funkcji javascript w szablonie flash

[Engine]

Kod:

function jspopupWindow(event:MouseEvent):void {

var desiredURL:URLRequest = new URLRequest("javascript:NewWindow=window.open('page.html','newWin','width=400,height=300,left=0,top=0,toolbar=No,location=No,scrollbars=No,status=No,resizable=Yes,fullscreen=No');
NewWindow.focus(); void(0);");

navigateToURL(desiredURL, "_self");

}
popup_btn.addEventListener(MouseEvent.CLICK, jspopupWindow);