Hello,
You really need to solve this problem on the HTML side of things.
What I would suggest is to use ONLY the HTML you want seen in your own .html flle that you can host on a free web server ( such as GoDaddy ).
I am assuming the content is not yours (u want to show someone elses content ) so only copy the HTML code you want to host on your modified .html file.
This should work perfectly.
Regards,
Sean - MediaSIgnage.com