Firefox is moving my tables when loading page

when loading the page the table moves

[gadishoshani]

sorry i have to give the site's address coz i dont know how to explain it that well:
the websites name is gilplastic (.com)

when loaded in firefox - the tables start loading when they are right to left, when the page finishes loading - it jumps to where it should be..

how do i fix that please?
(PS - im a real html beginner.. im only helping a friends here.. so plz keep it simple)

** ALSO: why doesnt firefox show the empty line <br/> i've put in the H1?

Thanks!

[Major_Payne]

No document type puts browsers in Quirks Mode and this causes problems with parsing the page as you want it.

Just 1 CSS error [jigsaw.w3.org].

17 critical HTML errors [validator.w3.org].

Table layouts went out in the late 1990s. Many people do not know this, but table code has to be parsed TWICE before the browser displays it.

Recommend:

Tableless Web Design: [en.wikipedia.org...]
How to convert manually your HTML tables to CSS: [table2css.com...]
Images, Tables, and Mysterious Gaps: [developer.mozilla.org...]

[gadishoshani]

Thanks!

I guess I have a lot of reading to do..
:(

[Major_Payne]

You're welcome. Post back if you have a particular problem with this.