在IE5下的Javascript： Array不支持push(),pop()；Function不支持apply()；String对象的replace方法不支持替换成一个处理函数。 使用下面的代码就可修复上述方法在IE5下无效的问题。 /* 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; }; };

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本文标题：fix-ie5.js扩展在IE5下不能使用的几个方法

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