一段判断浏览器版本的代码，报下标越界
这段代码是在网上直接抄来用的。目的是判断浏览器版本。
在IE下不报错，在chrome和safari下都报错说下标越界

谁能帮忙改改？谢谢

<%

Dim Agent,Browser,version,tmpstr



Agent=Request.ServerVariables("HTTP_USER_AGENT")

Agent=Split(Agent,";")

If InStr(Agent(1),"MSIE")>0 Then

   Browser="MS Internet Explorer "

   version=Trim(Left(Replace(Agent(1),"MSIE",""),6))

ElseIf InStr(Agent(4),"Netscape")>0 Then

   Browser="Netscape "

   tmpstr=Split(Agent(4),"/")

   version=tmpstr(UBound(tmpstr))

ElseIf InStr(Agent(4),"rv:")>0 Then

   Browser="Mozilla "

   tmpstr=Split(Agent(4),":")

   version=tmpstr(UBound(tmpstr))

 If InStr(version,")") > 0 Then

   tmpstr=Split(version,")")

   version=tmpstr(0)

 End If

End If

%>

------解决方案--------------------
下标越界，超过了数组的最大值，所以报错。

<%

Dim Agent,Browser,version,tmpstr



Agent=Request.ServerVariables("HTTP_USER_AGENT")

 

If InStr(Agent ,"MSIE")>0 Then

   Browser="MS Internet Explorer "

   version=Trim(Left(Replace(Agent(1),"MSIE",""),6))

ElseIf InStr(Agent ,"Netscape")>0 Then

   Browser="Netscape "

   tmpstr=Split(Agent ,"/")

   version=tmpstr(UBound(tmpstr))

ElseIf InStr(Agent ,"Chrome")>0 Then

   Browser="Chrome "

   tmpstr=Split(Agent ,"/")

   version=tmpstr(UBound(tmpstr))

ElseIf InStr(Agent ,"Firefox ")>0 Then

   Browser="Firefox "

   tmpstr=Split(Agent ,"/")

   version=tmpstr(UBound(tmpstr))

ElseIf InStr(Agent ,"Safari ")>0 Then

   Browser="Safari "

   tmpstr=Split(Agent ,"/")

   version=tmpstr(UBound(tmpstr))   

ElseIf InStr(Agent ,"rv:")>0 Then