Fix MS Internet Explorer (IE) 8 javascript “Tag is Invalid” issue on Windows Vista/7/2008
If you are trying to perform certain javascript operations such as Window.open() and document.write() without any success and getting “The Tag is Invalid” error, the following fix might help you.
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Fix MS Internet Explorer (IE) 8 Javascript "Tag is Invalid" Issue on Windows V...
milly
milly 1:34 pm on September 28, 2011
It is possible the older version of Office was installed on the computer, and later upgraded, but still leaves docobj.dll behind.
To fix it, do the following:
1. Close all IE windows.
2. Start command prompt as Administrator. (Run “cmd” as Administrator)
3. Go to C:\Windows\system32, unregister docobj.dll (regsvr32 -u docobj.dll)
4. Go to C:\Program Files\Internet Explorer, register ieproxy.dll (regsvr32 ieproxy.dll)
5. Try IE again.