Remove Duplicated movieclip

programming flash
1

I want to remove every duplicated clip with the clip.OnRelease bellow

var ij = 0;
function sload() {

for (var i = 0; i<image.length; i++) {
    var clip = drawSquare(this, i, 0, 0, 0, 110, 155);
    clip._x = 350+(i%columns)*spacex;
    clip._y = 20+Math.floor(i/columns)*spacey;
    var clap = clip.createEmptyMovieClip("tt", 1);
    clap._x = 2;
    clap._y = 2;
    cliparray.push(clap);
    clip.pictureValue = i;






    clip.onRelease = function() {
        p = this.pictureValue-1;
        nextImage();

//->HERE
[COLOR=Red] unloadMovie(???);[/COLOR]
trace(this);

    };
    clip.onRollOver = function() {
        this._alpha = 50;


    };
    clip.onRollOut = function() {
        this._alpha = 100;

    };
}