ActionScript 2.0 :: Combining HitTest, Drag And OnEnter Events

i've got a movie where i've got 3 color slider and 1 gray slider the functionality is supposed to be that the gray slider moves along as the avg of the 3 color sliders xPos unless it is clicked, where it then controls the xPos of the color sliders and then can slide them dynamically. here's the code inside the gray slider:

PHP Code:

this.onMouseUp=function(){
stopDrag();
}
this.onEnterFrame=function(){

[Code]...