睡狗攻略:asp编程请教

<%
Const fsoForReading = 1
Dim objFile, objFolder, objSubFolder, objTextStream
Dim bolCase, bolFileFound, bolTagFound
Dim strCount, strDeTag, strExt, strFile, strContent, strRoot, strTag, strText, strTitle, strTitleL
Dim reqImage, reqJavaS, reqLength, reqNumber, reqZip

strFile = ".asp .htm .html .js .txt .css"
strRoot = "/"
strText = Request("SearchText")
strTag = Chr(37) & Chr(62)
bolFileFound = False
bolTagFound = False
If Request("Case") = "on" Then bolCase = 0 Else bolCase = 1
If Request("iImage") = "on" Then reqImage = "<IMG" Else reqImage = ""
If Request("iZips") = "on" Then reqZips = ".zip" Else reqImage = ""
If Request("iJavaS") = "on" Then reqJavaS = "JavaScript" Else reqImage = ""
If Request("rResults") = "10" Then reqNumber = 10
If Request("rResults") = "25" Then reqNumber = 25
If Request("rResults") = "50" Then reqNumber = 50
reqLength = Request("rLength")

Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
Set objFolder = objFSO.GetFolder(Server.MapPath(strRoot))

schSubFol(objFolder)

Sub schSubFol(objFolder)
For Each objFile in objFolder.Files
If strCount + 1 > reqNumber or strText = "" Then Exit Sub
If Response.IsClientConnected Then
Set objTextStream = objFSO.OpenTextFile(objFile.Path,fsoForReading)

strContent = objTextStream.ReadAll

If InStr(1, strContent, strTag, bolCase) Then
Else 这两行有错误 谁给指点一下？ 这是个站内搜索的程序
If Mid(objFile.Name, Len(objFile.Name) - 1, 1) = "." Then strExt = Mid(objFile.Name, Len(objFile.Name) - 1, 2)
If Mid(objFile.Name, Len(objFile.Name) - 2, 1) = "." Then strExt = Mid(objFile.Name, Len(objFile.Name) - 2, 3)
If Mid(objFile.Name, Len(objFile.Name) - 3, 1) = "." Then strExt = Mid(objFile.Name, Len(objFile.Name) - 3, 4)
If Mid(objFile.Name, Len(objFile.Name) - 4, 1) = "." Then strExt = Mid(objFile.Name, Len(objFile.Name) - 4, 5)
If InStr(1, strContent, strText, bolCase) And _
InStr(1, strContent, reqImage, 1) And _
InStr(1, strContent, reqZips, 1) And _
InStr(1, strContent, reqJavaS, 1) And _
Instr(1, strFile, strExt, 1) Then
If InStr(1, strContent, "<TITLE>", 1) Then strTitle = Mid(strContent, InStr(1, strContent, "<TITLE>", 1) + 7, InStr(1, strContent, "</TITLE>", 1)) Else strTitle = "未命名"

strCount = strCount + 1
Response.Write "<DL><DT><B><I>"& strCount &"</I></B> - <A HREF=" & objFile.Path & ">" & strTitle & "</A></A></DT><BR><DD>"
strTitleL = InStr(1, strContent, "</TITLE>", 1) - InStr(1, strContent, "<TITLE>", 1) + 7

strDeTag = ""
bolTagFound = False