介绍一个判断plug-ins/ActiveX 是否存在的例子

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") nn="true"
' Netscape 3 or greater
end if
end if

if ie32 then
%>



elseif nn then