代码如下：
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<title>UTF-8字符与GB2312中文编码在线转换</title><body>
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<p><strong>UTF8转换工具(UTF-8字符与GB2312中文编码在线转换)</strong></p>
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<p align="center">使用方法：在下面的文本框中输入中文文字，按“转化”，即可将其转化为UTF-8字符。</p>
<p align="left">再按“还原”，即可将其还原为简体中文。</p>
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<textarea name="" cols="" rows=13 id=code style="WIDTH: 95%">
</textarea>
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<input type=button onclick=encode(code,this) value=" 转 换 ">
<script>
var mode="zhuan";
function encode(obj,btn){
if(mode=="zhuan"){
obj.value=obj.value.replace(/[^\u0000-\u00FF]/g,function($0){return escape($0).replace(/(%u)(\w{4})/gi,"&#x$2;")});
btn.value=" 还 原 ";
mode="huan";
}else{
obj.value=unescape(obj.value.replace(/&#x/g,'%u').replace(/;/g,''));
btn.value=" 转 换 ";
mode="zhuan";
}
}
</script>
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