IE扩展Function.prototype.bind()方法

IE6~IE8不支持Function原型的bind()方法，所以对其进行扩展。

var Iflat = Iflat || {};
Iflat.Browser = {
    extend: = {
        ieFuncBind: function() {
            if(!Function.prototype.bind) {
                Function.prototype.bind = function(oThis) {
                    if(typeof this !== 'function') {
                        // closest thing possible to the ECMAScipt 5
                        // internal IsCallable function
                        throw new TypeError('What is trying to be bound is not callable');
                    }
                    var aArgs = Array.prototype.slice.call(arguments, 1);
                    var fToBind = this;
                    var fNOP = function(){};
                    var fBound = function() {
                        return fToBind.apply(this instanceof fNOP ? this : oThis,
                                aArgs.contac(Array.prototype.slice.call(arguments)));
                    }
                    fNOP.prototype = this.prototype;
                    fBound.prototype = new fNOP();
                    eturn fBound;
                };
            }
        }
    }
}