Website looks different on a Mac

I have just created a website which looks fine on firefox PC but looks t开发者_开发百科otally different on Firefox Mac.

On Mac I don't see a div background image. On mac in the footer, an item that is floated to the left appears on the right and an item that is floated to the right appears on the left.

A facebook div that I have commented with <!-- appears on Mac but not on PC.

The site is: http://www.ruthrudin.co.il

Can anyone help with these problems?

I only briefly had a chance to look at the source, but did notice that on line 66 you illegally nest an HTML comment <!-- </div><!--. Your usage of <SCRIPT LANGUAGE="JavaScript"> is invalid and should match how you did the jquery <script type="text/javascript">your code here</script>.

Run your code through a validator. The browsers do differ in how they handle invalid markup across operating systems, even from the same vendor.