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用Javascript检查Adobe PDF插件是否安装的实现代码

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<html xmlns="http://www.w3.org/1999/xhtml"> 
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<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>无标题文档</title> 
<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20type%3D%22text%2Fjavascript%22%3E%3C!--%20%0D%0Afunction%20isAcrobatPluginInstall()%7B%20%0D%0A%2F%2F%E5%A6%82%E6%9E%9C%E6%98%AFfirefox%E6%B5%8F%E8%A7%88%E5%99%A8%20%0D%0Aif%20(navigator.plugins%20%26%26%20navigator.plugins.length)%20%7B%20%0D%0Afor%20(x%3D0%3B%20x%3Cnavigator.plugins.length%3Bx%2B%2B)%20%7B%20%0D%0A%20%20%20%20%20%0D%0Aif%20(navigator.plugins%5Bx%5D.name%3D%3D%20'Adobe%20Acrobat')%20%0D%0Areturn%20true%3B%20%0D%0A%7D%20%0D%0A%7D%20%0D%0A%2F%2F%E4%B8%8B%E9%9D%A2%E4%BB%A3%E7%A0%81%E9%83%BD%E6%98%AF%E5%A4%84%E7%90%86IE%E6%B5%8F%E8%A7%88%E5%99%A8%E7%9A%84%E6%83%85%E5%86%B5%20%0D%0Aelse%20if%20(window.ActiveXObject)%20%0D%0A%7B%20%0D%0Afor%20(x%3D2%3B%20x%3C10%3B%20x%2B%2B)%20%0D%0A%7B%20%0D%0Atry%20%0D%0A%7B%20%0D%0AoAcro%3Deval(%22new%20ActiveXObject('PDF.PdfCtrl.%22%2Bx%2B%22')%3B%22)%3B%20%0D%0Aif%20(oAcro)%20%0D%0A%7B%20%0D%0A%20%20%20%20return%20true%3B%20%0D%0A%7D%20%0D%0A%7D%20%0D%0Acatch(e)%20%7B%7D%20%0D%0A%7D%20%0D%0Atry%20%0D%0A%7B%20%0D%0AoAcro4%3Dnew%20ActiveXObject('PDF.PdfCtrl.1')%3B%20%0D%0Aif%20(oAcro4)%20%0D%0Areturn%20true%3B%20%0D%0A%7D%20%0D%0Acatch(e)%20%7B%7D%20%0D%0Atry%20%0D%0A%7B%20%0D%0AoAcro7%3Dnew%20ActiveXObject('AcroPDF.PDF.1')%3B%20%0D%0Aif%20(oAcro7)%20%0D%0Areturn%20true%3B%20%0D%0A%7D%20%0D%0Acatch(e)%20%7B%7D%20%0D%0A%7D%20%0D%0A%7D%20%0D%0A%2F%2F%20--%3E%3C%2Fscript%3E"> 
</head> 
<body> 
<input type="button" name="kkk" value="点击检查Adobe Acrobat 插件是否安装" onclick="if(isAcrobatPluginInstall()) alert('Adobe Acrobat 插件已安装');" /> 
</body> 
</html>

　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

　　上面代码在IE6.0和firefox 3.0下运行通过。

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