fix-ie5.js：解决IE5下Array、Function及String方法缺失问题

IE5 JavaScript兼容性问题分析

在IE5浏览器环境中运行JavaScript时，会遇到一些标准方法不可用的情况。

具体表现为：Array对象不支持push()和pop()方法；Function对象不支持apply()方法；此外，String对象的replace方法也无法接受替换处理函数作为参数。

通过引入特定的修复代码，可以解决上述方法在IE5环境下无效的问题。

fix-ie5.js 修复代码实现

fix-ie5.js, version 1.0 (pre-release) (2005/05/15) x3

Copyright 2005, Dean Edwards

Web: http://dean.edwards.name/

This software is licensed under the CC-GNU LGPL

Web: http://creativecommons.org/licenses/LGPL/2.1/

if (/MSIE 5.0/.test(navigator.userAgent)) new function() {

var $$apply = function($function, $object, $arguments) {

$function.apply($object, $arguments);

// fix String.replace

if (''.replace(/^/, String)) {

// preserve String.replace

var _stringReplace = String.prototype.replace;

// create String.replace for handling functions

var _functionReplace = function($expression, $replacement) {

var $match, $newString = "", $string = this;

while ($string && ($match = $expression.exec($string))) {

$newString += $string.slice(0, $match.index) + $$apply($replacement, this, $match);

$string = $string.slice($match.lastIndex);

return $newString + $string;

// replace String.replace

String.prototype.replace = function ($expression, $replacement) {

this.replace = (typeof $replacement == "function") ? _functionReplace : _stringReplace;

return this.replace($expression, $replacement);

// fix Function.apply

if (!Function.apply) {

var APPLY = "apply-" + Number(new Date);

$$apply = function(f, o, a) {

var r;

o[APPLY] = f;

switch (a.length) { // deconstruct for speed

case 0: r = o[APPLY](); break;

case 1: r = o[APPLY](a[0]); break;

case 2: r = o[APPLY](a[0], a[1]); break;

case 3: r = o[APPLY](a[0], a[1], a[2]); break;

case 4: r = o[APPLY](a[0], a[1], a[2], a[3]); break;

default:

var aa = [], i = a.length - 1;

do aa[i] = "a[" + i + "]"; while (i--);

eval("r=o[APPLY](" + aa + ")");

delete o[APPLY];

return r;

// fix ICommon

ICommon.valueOf.prototype.inherit = function() {

return $$apply(arguments.callee.caller.ancestor, this, arguments);

// array fixes

if (![].push) Array.prototype.push = function() {

for (var i = 0; i < arguments.length; i++) {

this[this.length] = arguments[i];

return this.length;

if (![].pop) Array.prototype.pop = function() {

var $item = this[this.length - 1];

this.length--;

return $item;