Remove mouse movement

Hi all,

Ive adapted the falling snow 2.0 script from the tutorial, but I canT get rid of the mouse movement. Can you give me a hint…

onClipEvent (load) {
	//variables
	width = 300;
	height = 200;
	//random x,y, and alpha 
	this._xscale = this._yscale=50+Math.random()*100;
	this._alpha = 20+Math.random()*50;
	//random x and y for flakes
	this._x = -width+Math.random()*(3*width);
	this._y = -10+Math.random()*height;
	//speed and trigonometric value
	i = 1+Math.random()*2;
	k = -Math.PI+Math.random()*Math.PI;
	rad = 0;
}
onClipEvent (enterFrame) {
	// horizontal movement
	rad += (k/180)*Math.PI;
	xmovement = _root._xmouse;
	this._x -= Math.cos(rad)+(xmovement-(width/2))/50;
	// vertical movement
	this._y += i;
	// remove clips when they misbehave (overstep boundaries)
	if (this._x>(width+50)) {
		this._x = -45;
		this._y = Math.random()*height*2;
	}
	if (this._x<-50) {
		this._x = width+45;
		this._y = Math.random()*height*2;
	}
	if (this._y>=height) {
		this._y = -50;
		this._x = -width+Math.random()*(3*width);
	}
}

thanks a bunch,
m.