How to use a JavaScript ActiveXObject object to check whether an application is installed _ javascript skills

This article mainly introduces how to use the ActiveXObject object of JavaScript to check whether the application is installed. If you need it, you can refer to your own internal program and call the external protocol for normal use, however, the external protocol must work with a client. Therefore, you can use js to determine whether the client is installed. If the client is not installed, you can jump to the download address, which is similar to some Download Links of thunder and express on the Internet. The query method is as follows:

The Code is as follows: