当构造函数遇到 YUI3 封装机制

/*
* 构造确认操作对话框
* @constructor ConfirmBox
*/

var ConfirmBox, confirmOff, confirmDel;

ConfirmBox = function(msg, url){

this.msg = msg;
this.url = url;

};

ConfirmBox.prototype.fire = function(e){

var message = confirm(this.msg);

if(message){

window.location.href = this.url;

}
};

/*
* 确定下架此楼盘？
* @instance confirmOff
*/
confirmOff = new ConfirmBox('确定下架此楼盘？', config.offUrl);

if(Y.all('.sale-off')){
Y.on('click', confirmOff.fire, '.sale-off', confirmOff);
}