fineui/src/core/proto/function.js

Function.prototype.before = function (func) {
    var __self = this;
    return function () {
        if (func.apply(this, arguments) === false) {
            return false;
        }
        return __self.apply(this, arguments);
    };
};

Function.prototype.after = function (func) {
    var __self = this;
    return function () {
        var ret = __self.apply(this, arguments);
        if (ret === false) {
            return false;
        }
        func.apply(this, arguments);
        return ret;
    };
};