利用Unescape实现的网页代码加密和解密功能，网提供的站长工具中就有这个效果，将上面文本框中的密文连续解密两次就可以得到本特效的原文。解密的过程：利用unescape方法对“密文”框里的内容进行解码；加密的过程：利用escape方法对“明文”框里的内容进行编码。
演示：
<html><head><title>网页加密</title><style>textarea {width:90%;height:30%}</style></head><body bgcolor="#C0C0C0"><p align="center"><textarea id=s rows="16" cols="20" style="border: 1 solid #000000;overflow:auto" name="s"><script><!--document.write(unescape("%3Cscript%3E%0D%0A%3C%21--%0D%0Adocument.write%28unescape%28%22%253Cstyle%253E%250D%250Atextarea%257Bwidth%253A90%2525%253Bheight%253A30%2525%257D%250D%250A%253C/style%253E%250D%250A%250D%250A%253Ctextarea%2520id%253Ds%253E%25u5BC6%25u6587%25u653E%25u8FD9%25u8FB9%253C/textarea%253E%250D%250A%250D%250A%253Chr%253E%250D%250A%253Cinput%2520type%253Dbutton%2520onclick%253Ddecode%2528%2529%2520value%253D%25u89E3%25u5BC6%253E%250D%250A%253Cinput%2520type%253Dbutton%2520onclick%253Dredecode%2528%2529%2520value%253D%25u518D%25u89E3%253E%250D%250A%257C%250D%250A%253Cinput%2520type%253Dbutton%2520onclick%253Dencode%2528%2529%2520value%253D%25u52A0%25u5BC6%253E%250D%250A%253Cinput%2520type%253Dbutton%2520onclick%253Dreencode%2528%2529%2520value%253D%25u518D%25u52A0%253E%250D%250A%253Chr%253E%250D%250A%253Ctextarea%2520id%253Dd%253E%25u660E%25u6587%25u5728%25u8FD9%25u91CC%2520%253C/textarea%253E%250D%250A%253Cscript%253E%250D%250Afunction%2520decode%2528%2529%257B%250D%250Ad.value%253Dunescape%2528s.value%2529%250D%250A%257D%250D%250A%250D%250Afunction%2520redecode%2528%2529%257B%250D%250Ad.value%253Dunescape%2528d.value%2529%250D%250A%257D%250D%250Afunction%2520encode%2528%2529%257B%250D%250As.value%253Descape%2528d.value%2529%250D%250A%257D%250D%250Afunction%2520reencode%2528%2529%257B%250D%250As.value%253Descape%2528s.value%2529%250D%250A%257D%250D%250A%253C/script%253E%250D%250A%22%29%29%3B%0D%0A//--%3E%0D%0A%3C/script%3E"));//--></script></textarea><hr size="1" color="#000000"><p align=center><input type=button onclick=decode() value=解密 style="background-color: #FFFFFF; border-style: solid; border-width: 1"><input type=button onclick=redecode() value=再解 style="background-color: #FFFFFF; border: 1 solid #000000"> |<input type=button onclick=encode() value=加密 style="background-color: #FFFFFF; border: 1 solid #000000"><input type=button onclick=reencode() value=再加 style="background-color: #FFFFFF; border: 1 solid #000000"> <br> <hr size="1" color="#000000"><p align="center"><textarea id=d rows="16" cols="20" style="border: 1 solid #000000;overflow:auto" name="d">明文在这里 </textarea><p align="center">将上面文本框中的密文连续解密两次就可以得到本特效的原文。</body></html><script language=javascript>function decode(){ //解密的过程d.value=unescape(s.value) //利用unescape方法对“密文”框里的内容进行解码}function redecode(){ //再次解密的过程d.value=unescape(d.value) //源文本来自“明文”框}function encode(){ //加密的过程s.value=escape(d.value) //利用escape方法对“明文”框里的内容进行编码s.value='<script><!--document.write(unescape("' + s.value + '"))--></script' + '>'}function reencode(){ //再加密的过程s.value=escape(s.value) //源文本来自“密文”框s.value='<script><!--document.write(unescape("' + s.value + '"))--></script' + '>'}</script> <div style="text-align:center;margin:30px 0 0 0;"><hr style="color:#999;height:1px;">如不能显示效果，请按Ctrl+F5刷新本页，更多网页代码：<a href='http://www.wfuyu.com/' target='_blank'>http://www.wfuyu.com/</a></div>提示：可修改后代码再运行!
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