ASP页面随机添加字符实现防复制的代码

<%
        '作用:文字防复制乱码 函数
        'date:2006-3-6
        '作者:blue2004
        '参数str 为原文,str1作者也是你自己,reslut产生乱码的种子
        function readtocode(str,str1,result)
                dim name
                dim i,j,k
                if isnull(str) then
                        readtocode=""
                        exit function
                end if
                randomize 
                k=instr(str,"</p>")
                do while k>0
                        result=""
                        for i=0 to 19
                                j=int(128 * rnd)+1
                                if j=60 or j=62 then
                                        j=j+1
                                end if
                                result =result&chr(j) ' 产生随机数。
                        next 
                        result="<span style='display: none'>"&result&"</span>"
                        str=replace(str,"</p>",result&"<'/p>",1,1)
                        k=instr(str,"</p>")
                loop
                str=replace(str,"<'/p>","</p>")

                k=instr(str,"<br>")
                do while k>0
                        result=""
                        for i=0 to 19
                                j=int(128 * rnd)+1
                                if j=60 or j=62 then
                                        j=j+1
                                end if
                                result =result&chr(j) ' 产生随机数。
                        next 
                        result="<span style='display: none'>"&result&"</span>"
                        str=replace(str,"<br>",result&"<'br>",1,1)
                        k=instr(str,"<br>")
                loop
                str=replace(str,"<'br>","<br>")
                readtocode=str&"<div align=right style='color=gray'>[版权归原作者及"&str1&"共同拥有，转载请注明出处]</div>"
        end function


dim a 
a="嘎嘎，一篇<br>不错的好<p>文章哦</p><br><p>我艹，，让你偷。。木　jj的家伙,嬲。。</p>"


'only for test
response.write (a)

dim b
'为配合转换,字符串ａ的大小都替换成小写
b=readtocode(lcase(a),"blue2004","www.xxx.com")

'output
response.write b
%>