actionscript 3.0 controlling closures eventuality handlers

i attempted doing this:

root.addeventlistener("click", 
   duty () 
   { 
      navigatetourl(clickurlrequest,"_self"); 
   });

and does supplement eventuality listener. i controlling closures since work good situation,

however, stealing eventuality listener requires anxiety uncanny function, given i used an opposite closure, does work, i tried:

   root.removeeventlistener("click", 
       duty () 
       { 
          navigatetourl(clickurlrequest,"_self"); 
       });

as good as:

   root.removeeventlistener("click", duty () {} );

the wholly proceed i found work embankment opposite closure indicate eventuality listeners during pre-existing function:

 duty onclick (e:event)
 {
     navigatetourl(clickurlrequest,"_self");
 }

 root.addeventlistener("click", onclick);
 root.removeeventlistener("click", onclick);

does anyone know proceed opposite closures eventuality handlers while still maintaining ability mislay them?