Question : How can I make Excel save an extra meta tag line each time it is modified and saved to web format?

I have a spreadsheet that gets saved as a "web page" (.htm) and is then viewed by many from their browser. The data in this sheet is being modified regularly throughout the day, so I would like the browsers to automatically refresh the page at regular intervals. I know this is done using a meta tag such as to force a refresh every 30 seconds. When I manually add this line to the .htm file, it works perfectly. The problem is that each time the sheet (opened from the .htm document) is changed and then re-saved, the meta tag goes away and no refresh happens.
Is there a way I can either leave that meta tag line alone when modifying it or to add in the extra meta tag line I want every time that sheet is changed?
Thank you all for your kind input.
 

Answer : How can I make Excel save an extra meta tag line each time it is modified and saved to web format?

OK.  I think I follow what you mean (I'm not a programmer, I'm a network engineer.) The meta tag that I used to make it work like I wanted was simply this line:  added right under the section of the .htm file. I simply opened up the file using notepad and pasted it in there. That made the file refresh every 30 seconds in the browser viewing it, just as I wanted. (Then when the file was re-opened (from the .htm file) and re-saved, it was gone.)
Now, I do know that it is important that this meta tag line is put in the section of the file. Will it know where to put the line?

Here is the important part of the file I am referring to: (From the beginning of the file:)

xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns="http://www.w3.org/TR/REC-html40">





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