ASP get Address bar parameter code

ASP get Address bar parameter code
============================================

Function Name: Joinchar
Role: Add to the address? Or &
Parameters: strURL----URL
Return value: Added? or & 's Web site
POS=INSTR (1, "ABCDEFG", "CD")
The POS returns 3 to find and the position begins with the third character.
This is the "find" implementation, and the "Find Next" feature
The implementation is to continue to find the current position as the starting position.
============================================

function Joinchar (strURL)
If Strurl= "" Then
Joinchar= ""
Exit function
End If
If InStr (strURL, "?") <len (strURL) Then
If InStr (strURL, "?") >1 Then
If InStr (strURL, "&") <len (strURL) Then
Joinchar=strurl & "&"
Else
Joinchar=strurl
End If
Else
Joinchar=strurl & "?"
End If
Else
Joinchar=strurl
End If
End Function