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Using HTML to check if a website window is already open.

  1. I searched, really I did. Google reported over a million hits, and the first ten thousand were about Javascripts. ;-) But all I want to do is use a bit of HTML in some of my widgets that include URLs to check if the linked website is already open in a user's browser.

    I now use the target="_blank" to open new windows, but what extra command do I add to check to see if the window with the target URL is already open?

    Thanks,

    TW

  2. I don't think you can check for existing windows/tabs with HTML. You can only specify a target frame.

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