That can solve you by the moment you make yourself Internet site and in html-code for changing are, always again your page to recall in both Internet Explorer and Mozilla (and evt. in Chrome), so that you exact weet what happens there in these browsers if you change something.
The models have been this way made, which them in the all three look forward to browsers there well. But that can of course change if you will modify in the code.
Have you still problems, then I want look at personally for €10,00 to html-code of your site. See: html aid.