IE下使用bind的JS方法

在写其它的JS代码前，先加入该段代码。

*该方法不知道来自哪里了，记录一下。

if (!Function.prototype.bind) {

Function.prototype.bind = function (oThis) {
if (typeof this !== "function") {
// closest thing possible to the ECMAScript 5 internal IsCallable function
throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
}

var aArgs = Array.prototype.slice.call(arguments, 1),
fToBind = this,
fNOP = function () {},
fBound = function () {
return fToBind.apply(this instanceof fNOP && oThis ? this : oThis, aArgs.concat(Array.prototype.slice.call(arguments)));
};

fNOP.prototype = this.prototype;
fBound.prototype = new fNOP();

return fBound;
};
}