解决低版本ie，bind函数未定义问题

//bind函数兼容 (function(){ //解决IE10以下不支持Function.bind if (!Function.prototype.bind) { Function.prototype.bind = function(oThis) { if (typeof this !== "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; }; } })();