Can't find a way to put a property as an argument in a function

Hi,

I didn't find a way to put a property (position, anchorPoint etc.) as an argument in a function.

I tried:

It's a function inside a loop.

function loopArray(theArray,layers,theProp,n){

     for (var j=0; j<theArray.length; j++){

          layers[n].theProp.setSelectedAtKey(parseInt(theArray[j]),true);

     }

}

for (var i=0; i<layers.length; i++){

     loopArray(anotherArray,someLayers,AnchorPoint,i);

}

It does't work.

Thx in advance

Candos