There's a nasty JavaScript browser bug on the loose; if it hasn't gotten to you yet, it may be just around the corner. And even if this bug hasn't bitten you, you still need to worry about it, because it's probably attacking people visiting your site.

This particular creepy-crawly is the mutant offspring of a star-crossed union between a beta version of Microsoft Internet Explorer 4.0 and the browser's final release. You've met the bug if you've ever gotten the perplexing "No such interface supported" error when clicking a link to open a pop-up window using IE 4.0.

The browser chokes on this line of code:

popupWin = window.open("file.html", "remote");

The weird thing is that only some users get this error. The article specifically focuses on the case when selecting "Open in new window" when right-clicking a hyperlink won't actually open window. But product support assured me that the JavaScript window.open() problem is related, and that the following resolution, excerpted from the article, will heal all:

1. Click the Start button on the Windows toolbar, then click Run.

2. In the Open box, type regsvr32 actxprxy.dll.

3. Click OK. You should see the following in a message box:

DllRegisterServer in actxprxy.dll succeeded.

4. Click OK.

5. Click the Start button, then click Run.

6. In the Open box, type regsvr32 shdocvw.dll.

7. Click OK. You should see the following in a message box:

DllRegisterServer in shdocvw.dll succeeded.

8. Click OK.

9. Shut down and restart Windows.