js 判断插件 存在 boject 标签 使用

1.打开注册表 regedit- 查找插件名称

AC53EFE4-94A7-47E6-BBFC-E9B9CF322299

js代码

<script type="text/javascript">
  
//   DWGVIEWX.DwgViewXCtrl.1

  var NewObj;
    try {
       // NewObj = new ActiveXObject("TVANTSX.TvantsXCtrl.1");
        NewObj = new ActiveXObject("DWGVIEWX.DwgViewXCtrl.1");
        if (typeof NewObj != 'undefined') {
            //NewObj = null;
            document.getElementById("Message").style.display="none";
            //return true;
        }
    } catch (e) {
    	 document.getElementById("DWGViewX").style.display="none";
    	// document.getElementById("Message").style.display="";
    	 alert("Dwg插件没有安装,或者禁用!,请安装插件!");
    }
  debugger;
  </script>

内嵌插件预览文件 

<OBJECT id="DWGViewX"  style="display"  classid="clsid:AC53EFE4-94A7-47E6-BBFC-E9B9CF322299" codebase="/draw/download/dwgviewx.cab" width="1200" height="750">
    <param name="_Version" value="65536">
    <param name="_ExtentX" value="18521">
    <param name="_ExtentY" value="13758">
    <param name="_StockProps" value="0">
    <!--  http://127.0.0.1:8096/draw/upload/201610/20161012104324045_829.dwg
       此处必须用文件的静态路径,流路径测试失败!
    -->
    <param name="DrawingFile" value="${fileUrl}">
    <param name="ShowToobar" value="-1">
    <param name="ShowLayoutBar" value="1">  
    </OBJECT>
  </body>