博客展示了一个URL编码与解码工具的实现。通过HTML创建页面，包含文本输入框和编码、解码按钮。使用JavaScript编写了encode和decode函数，分别实现对输入字符串的编码和解码操作，方便用户对URL进行处理。
出处：http://www.z4.cn/bbs/showthread.php?threadid=2939
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html>
<head>
<title>URL Decoder/Encoder</title>
<style type="text/css">
<!--
body {background: white; color: black;}
form {margin: 0;}
h1 {font-family: Arial, sans-serif; line-height: 0.85em; border-bottom: 2px solid; margin-bottom: 0.33em; padding-bottom: 0;}
textarea {background: #EEF;}
#footer {border-top: 1px solid #000; color: #999; font: italic 75% sans-serif;}
#footer p {margin: 0 0 1em 0;}
#footer img {float: right; margin: 0 0 0.5em 2em;}
-->
</style>
<script type="text/javascript">
function encode() {
var obj = document.getElementById('dencoder');
var unencoded = obj.value;
obj.value = escape(unencoded);
}
function decode() {
var obj = document.getElementById('dencoder');
var encoded = obj.value;
obj.value = unescape(encoded.replace(//+/g, " "));
}
</script>
</head>
<body><form onsubmit="return false;"><h1>URL Decoder/Encoder</h1>
<textarea cols="80" rows="20" id="dencoder"></textarea>
<div><input type="button" onclick="decode()" value="Decode">
<input type="button" onclick="encode()" value="Encode"></div>
<ul><li>Input a string of text and encode or decode it as you like.</li>
<li>Handy for turning encoded JavaScript URLs from complete gibberish into readable gibberish.</li>
<li>If you'd like to have the URL Decoder/Encoder for offline use, just view source and save to your hard drive.</li></ul></form>
</body>
</html>
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