关于网址和网页代码的问题拜托各位大神

这是采用了网站加密，如： <p> <a href= alt=FJ51758 软件下载站 天下网吧之家!天下网管之家!><img border=0 src=img.asp?id=1790></a></p> <p> <a href=><img border=0 src=img.asp?id=1791></a></p> <p> <a href=><img border=0 src=img.asp?id=1792></a></p> <p> <a target=blank href= V=1&Uin=199120535&Site=网吧电影系统v4.0&Menu=yes><img border=0 SRC= alt=代理销售 各种游戏点卡!点击这里给我发消 息></a> 加密之后是：document.write(unescape(%3Cscript%3E%0D%0A%3C%21--%0D%0Adocument.write%28unescape%28%22%253Cscript%253E%250D%250A%253C%2521--%250D%250Adocument.write%2528unescape%2528%2522%25253Cp%25253E%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252520%25253Ca%252520href%25253D%252522http%25253A//www.fj51758.com/%252522%252520alt%25253D%252522FJ51758%25250D%25250A%25250D%25250A%2525u8F6F%2525u4EF6%2525u4E0B%2525u8F7D%2525u7AD9%252520%2525u5929%2525u4E0B%2525u7F51%2525u5427%2525u4E4B%2525u5BB6%252521%2525u5929%2525u4E0B%2525u7F51%2525u7BA1%2525u4E4B%2525u5BB6%252521%252522%25253E%25253Cimg%252520border%25253D%2525220%252522%252520src%25253D%252522img.asp%25253Fid%25253D1790%252522%25253E%25253C/a%25253E%25253C/p%25253E%25250D%25250A%25253Cp%25253E%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252520%25253Ca%252520href%25253D%252522http%25253A//bbs.txwm.com/%252522%25253E%25253Cimg%252520%25250D%25250A%25250D%25250Aborder%25253D%2525220%252522%252520%25250D%25250A%25250D%25250Asrc%25253D%252522img.asp%25253Fid%25253D1791%252522%25253E%25253C/a%25253E%25253C/p%25253E%25250D%25250A%25253Cp%25253E%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252520%25253Ca%252520href%25253D%252522http%25253A//www.fjczy.com/%252522%25253E%25253Cimg%252520%25250D%25250A%25250D%25250Aborder%25253D%2525220%252522%252520%25250D%25250A%25250D%25250Asrc%25253D%252522img.asp%25253Fid%25253D1792%252522%25253E%25253C/a%25253E%25253C/p%25253E%25250D%25250A%25253Cp%25253E%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252526nbsp%25253B%252520%25253Ca%252520target%25253Dblank%252520href%25253Dhttp%25253A//wpa.qq.com/msgrd%25253F%25250D%25250A%25250D%25250AV%25253D1%252526Uin%25253D199120535%252526Site%25253D%2525u7F51%2525u5427%25250D%25250A%2525u7535%2525u5F71%2525u7CFB%2525u7EDFv4.0%252526Menu%25253Dyes%25253E%25253Cimg%252520border%25253D%2525220%252522%252520SRC%25253Dhttp%25253A//wpa.qq.com/pa%25253Fp%25253D1%25253A199120535%25253A1%252520alt%25253D%252522%2525u4EE3%2525u7406%2525u9500%2525u552E%25250D%25250A%25250D%25250A%2525u5404%2525u79CD%2525u6E38%2525u620F%2525u70B9%2525u5361%252521%2525u70B9%2525u51FB%2525u8FD9%2525u91CC%2525u7ED9%2525u6211%2525u53D1%2525u6D88%25250D%25250A%25250D%25250A%2525u606F%252522%25253E%25253C/a%25253E%2522%2529%2529%253B%250D%250A//--%253E%250D%250A%253C/script%253E%22%29%29%3B%0D%0A//--%3E%0D%0A%3C/script%3E)) 是不是晕了！！呵呵，其实这样的加密解密方法网上有很多的！！谢谢！