actionscript 3 - Can't interact with tiles in an interactive jigsaw puzzle (Flash CC AS3) -

i am doing interactive assignment media arts class , have no idea how code in action script 3. took orignal code tutorial , didn't work came here , attempted learn how modify it.

as3 code

//********************* // initialize:  flash.events.mouseevent var numpieces = 16;  (var = 0; < numpieces; i++) {     var piecename = "p" + (i + 1);     var piece = this[piecename];     if( piece ){         piece.name = piecename;         piece.addeventlistener(mouseevent.mouse_down, function)(evt)          {             this.scalex = 1;             this.scaley = 1;             this.shadow = null;             this.parent.addchild(this);// bump top             this.offset = {x:this.x - evt.stagex, y:this.y - evt.stagey};         });         piece.addeventlistener(mouseevent.mouse_move, function)          {             this.x = evt.stagex + this.offset.x;             this.y = evt.stagey + this.offset.y;         });         piece.addeventlistener(mouseevent.mouse_up, function)(evt)          {             var target = this.parent["t"+this.name.substr(1)];             if( target && hittestinrange( target, 30) ){                 this.x = target.x;                 this.y = target.y;             }         });     } }  function hittestinrange( target, range ) {     if( target.x > stage.mousex - range &&         target.x < stage.mousex + range &&         target.y > stage.mousey - range &&         target.y < stage.mousey + range )     {         return true;     }     return false; } 

please me fix code can run puzzle , move pieces. i can upload flash file if needed