Remove _level0.instance1

1

_level0.instance1.b7

is being returned once the onrelease event happens.
the loadmovie works fine but I want to remove

_level0.instance1.

and keep the** b7**


for (z = 0; z<buttonArray.length; z++){
buttonArray[z].onRelease = function (){
 var catch_var = this;
    loadMovie("intro_page"+catch_var+".swf", _parent.target_path);
}
}

This is the array of buttons

buttonArray = [b1, b2, b3, b4, b5, b6, b7, b8, b9, b10];

not really sure about how to remove this level path within variables.
Is it even possible???