I just don't know where to inject one into an ASP.NET user control file. I could find a google hint on how to do it in my HTML file before I upload the skin. However, is there a way to do it after the skin parsing has already occurred? 

Please advise!

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if your skin is done the correct HTML format, and the Skin parser in DNN adds the artfact, then I would suggest that you could clean it up in the resultant .ascx file in your skin folder after your  html being parsed.

The corrections you make will cure the issue until the next time you parse the HTML

Salar