js檢測客戶端瀏覽器是否安裝flash插件

摘自：http://www.1netmedia.cn/base/blogview.asp?logID=1142

<script type=text/Javascript>
<!--
var i_Flash;
var v_Flash;
// Netscape
if (navigator.plugins) {
  for (var i=0; i < navigator.plugins.length; i++) {
    if (navigator.plugins[i].name.toLowerCase().indexOf("shockwave Flash") >= 0) {
      i_Flash = true;
      v_Flash = navigator.plugins[i].description.substring(navigator.plugins[i].description.toLowerCase().lastIndexOf("Flash ") + 6, navigator.plugins[i].description.length);
    }
  }
}
// -->
</script>
<script type=text/vbscript>
<!--
//IE
on error resume next
set f = createObject("ShockwaveFlash.ShockwaveFlash")
if IsObject(f) then
i_Flash = true
v_Flash = hex(f.FlashVersion())
end if
// -->
</script>

<div id="cont"></div>

<SCRIPT type=text/Javascript>
<!--
if (!i_Flash) {
  document.getElementById("cont").innerText="你沒有安裝瀏覽器Flash插件，請下載安裝瀏覽器Flash插件才能瀏覽該網站";
}else{
  document.getElementById("cont").innerText="你已經安裝了Flash插件";
  if (v_Flash) {
    document.getElementById("cont").innerText=document.getElementById("cont").innerText+" - 版本 " + v_Flash;
  }
}
// -->
</SCRIPT>