Open IE Plugin or AJAX after checking user's Machine

[#1]

HI All, I have requriement to open a qvw link via IE Plug in if Plug in is already installed on user's machine, if not then open Full Browser version ( AJAX )

I found a java script code that checks for the same on user's machine.

May I know if someone has better idea than this and best way to implement this.

Thanks a lot.

  pluginEnabled = false  

try {        if(ActiveXObject) {            var _ = new ActiveXObject("QlikTech.QlikOcxCtrl");            pluginEnabled = true;        } 

  }

catch(e) {}