事件代理 proxy

var proxy = function(func, thisObject) {
        return (function() {
            return func.apply(thisObject, arguments);
        });
    };

//example
var clicky = {
    wasClicked: function() {},
    addListeners: function() {
        var self = this;
        $('.clicky').click(proxy(this.wasClicked, this));
    }
};

JQ也有这个方法