Need Help Snapping to Target (AS2)

programming flash
1

I am using Flash CS3 with AS2 and I have made a drag and drop. Everything works fine, but I don’t know how to make my movie clips snap to their targets. I have searched the forums, but I can’t find anything that will help me with what I already have going. Any help is appreciated.

Here is my actionscripting so far for one of the movieclips:

 
mangrove_mc.onPress = function() {
 startDrag(this);
 reply_txt.text = "";
 
 //this next line brings the selected object to the top
 this.swapDepths(this.getNextHighestDepth());
};
 
mangrove_mc.onRelease = function() {
 stopDrag();
 if (eval(this._droptarget) == mangroveTarget_mc) {
  reply_txt.text = "Yes, that's correct!";
 
  //this next line makes the object unmoveable after it has been placed in the right place.
  this.enabled = false;
 } else {
  reply_txt.text = "No, keep trying!";
 }
};