JavaScript樣本三（外掛程式檢測），javascript樣本
<html> <head> <title>外掛程式檢測</title> </head> <body><p>flash外掛程式和QuickTime外掛程式檢測</p> <script type="text/javascript">function hasPlugin(name){name=name.toLowerCase();for(var i=0;i<navigator.plugins.length;i++){if(navigator.plugins[i].name.toLowerCase().indexOf(name)>-1){return true;}}return false;}alert(hasPlugin("Flash")?"支援flash外掛程式":"不支援flash外掛程式");alert(hasPlugin("QuickTime")?"支援QuickTime外掛程式":"不支援QuickTime外掛程式"); </script> </body></html>
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