这里就以在IE3.02和Netscape3+的浏览器为例，介绍关于Flash(以Flash2为例)插件是否安装.

<%

a = lcase(request.servervariables("http_user_agent"))

if instr(a,"msie")>0 then

if instr(a,"98")>0 or instr(a,"95")>0 or instr(a,"nt")>0 then

ie32="true"

' IE 3 or greater on 32-bit

end if

elseif instr(a,"mozilla/3")>0 or instr(a,"mozilla/4")>0 then

if instr(a,"opera")<=0 then

nn="true"

' Netscape 3 or greater

end if

end if

if ie32 then

%>

<%

elseif nn then

%>

<%

end if

%>