css inheritance

Hello I have a html code loaded from external webpages using Javascript like this: <script src="[login to view URL]"> My html code inherit the styles of the webpage that loads it. I want that my loaded code doesn't gets modified by the webpages that load it. You should provide me a solution to have my html code to stay the same on every site that load it Tags of my html code are table, td, tr, font, form, input, select, option, p, br, div, a Thank you