让IE8浏览器支持function.bind()方法

<script type="text/javascript"> 
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 
"htmlcode">

<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> 
<style type="text/css"> 
body, html {width: 100%;height: 100%;margin:0;font-family:"微软雅黑";} 
#allmap{width:100%;height:500px;} 
p{margin-left:5px; font-size:14px;} 
</style> 
<script type="text/javascript" src="/UploadFiles/2021-04-02/api">