Scrollling menu


i am using this prototype as part of my xml menu. heres the ease code:

MovieClip.prototype.easeY = function(t) {
this.onEnterFrame = function() {
this._y = int(t-(t-this._y)/1.5);
if (this._y>t-1 && this._y<t+1) {
delete this.onEnterFrame;

and heres where i am calling it:

playlists_menu.list_bg.onEnterFrame = function() {
if (hitTest(_root._xmouse, _root._ymouse, true) && this._parent.playlist._height>this._height) {
ymin = this._y+this._height-this._parent.playlist._height;
ymax = this._y+3;
conv = (this._ymouse-15)1.3/this._height;
conv>1 ? conv=1 : null;
conv<0 ? conv=0 : null;

this works really great apart from it seems to apply itself to any movieclip!! so instead of moving the menu only when you mouse over it:

if (hitTest(_root._xmouse, _root._ymouse, true) && this._parent.playlist._height>this._height)

the menu is moved when you mouse over any movieclip!!

any ideas?