var b:Block = new Block() ;
b.stop();
b.addEventListener(MouseEvent.CLICK, onClick);
function onClick(event:MouseEvent):void
{
    trace(event.currentTarget.name);
}
world.addChild(b);
var k = Math.random();
if (k<0.4)
{
    b.gotoAndStop("xda");
    b.name = "bX:" + 1 + "|bY:" + 2+"|bt:"+b.currentLabel;
}