<html>
<body>
<form>
<textarea cols="70" rows="10" id="txt">请把你需要加密的内容粘贴在这里!</textarea><br>
<input type="button" onClick="txt.value=escape(txt.value);" value="加密" class="submit">
<input type="button" onClick="txt.value=unescape(txt.value)" value="解密" class="submit">
</form>
</body>
</html>