施用坐标来触发事件

var p:Point = new Point();
p.x = event.localX;
p.y = event.localY;
p = event.target.localToGlobal(p);
if(p.x > 100 && p.x < 720) {
	var objEvent:Event = new Event("materialEvent"); 
	dispatchEvent(objEvent); 
}