Use the Check Plugin behavior to send
visitors to different pages depending on whether they have the specified
plug‑in installed. For example, you might want visitors to go to
one page if they have Shockwave and another page if they do not.
Note: You
cannot detect specific plug‑ins in Internet Explorer using JavaScript. However,
selecting Flash or Director will add the appropriate VBScript code
to your page to detect those plug‑ins in Internet Explorer on Windows.
Plug‑in detection is impossible in Internet Explorer on Mac OS.