问题描述:

I have developed a toolbar (COM) for IE. One of my server application should identify whether the toolbar is installed in client system or not. If it's not installed on the client system the server application should prompt the user to user to install the toolbar.

How can I check whether the toolbar is installed or not?

网友答案:

Your toolbar can change the DOM, and Javascript can check this. No change, no toolbar.

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