How to click a drawing drawn from code(HTML5)

Like what.

I'd like to click on the jiaose pop-up prompt

var jiaose = {
name: "gw",
dh: function() {
var shape = new createjs.Shape(new createjs.Graphics().beginFill("#ff0000").drawRect(5, 5, 50, 50));
this.addChild(shape);
this.on("click", function(){alert("ss----")}); 
}
};