asp画中画广告插入在每篇文章中的实现方法

<div id="outer" style="float:left;">
<div id="inner" style="float:left;margin:0;width:200px;height:200px;"></div>
文字内容
</div>

Dim LeftContent,MidAdContent,RightContent,ModifyContent,headlen,tempStr,headAdStr,tailAdStr
''截取合适数量的字符串
if len(ArticleContent)<320 then
 headlen=200
else
 headlen=320
end if
tempStr=ArticleContent
LeftContent=InterceptString(tempStr,headlen)
'获得截取的文字内容
RightContent=Right(ArticleContent,Len(ArticleContent)-Len(LeftContent))
ModifyContent=LeftContent &"<div style=""float:left;""><script language=""javascript"" src=""http://www.eryi.org/ad.js""></script></div>"& RightContent

Function InterceptString(txt,length)
Dim x,y,ii,c,ischines,isascii,tempStr
txt=trim(txt)
x = len(txt)
y = 0
if x >= 1 then
 for ii = 1 to x
 c=asc(mid(txt,ii,1))
if c< 0 or c >255 then
  '说明是一个中文字符
 y = y + 2
 ischines=1
 isascii=0
else
  '说明是一个ascii码
 y = y + 1
 ischines=0
 isascii=1
end if
'如果长度已经大于定义子字符串长度，就判断是否包含敏感字符串是否分开
 if y >= length then
 if ischines=1 and StrCount(left(trim(txt),ii),"<a")=StrCount(left(trim(txt),ii),"</a>") then
 txt = left(trim(txt),ii) '"字符串限长
 exit for
  else
  if isascii=1 then x=x+1
  end if
 end if
 next
 InterceptString = txt
else
 InterceptString = ""
end if
End Function
'判断字符串出现的次数
Function StrCount(Str,SubStr) 
 Dim iStrCount
 Dim iStrStart
 Dim iTemp
 iStrCount = 0
 iStrStart = 1
 iTemp = 0
 Str=LCase(Str)
 SubStr=LCase(SubStr)
 Do While iStrStart < Len(Str)
 iTemp = Instr(iStrStart,Str,SubStr,vbTextCompare)
 If iTemp <=0 Then
  iStrStart = Len(Str)
 Else
  iStrStart = iTemp + Len(SubStr)
  
  iStrCount = iStrCount + 1
 End If
 Loop
 StrCount = iStrCount
End Function