webprutser - 1:44 pm on Feb 26, 2011 (gmt 0)

My own rule is: if something can be done with html/css without using javascript, I don't use javascript. I tried some things with javascript myself and ran into certain problems. I have a brother, who is an experienced programmer and he is not very enthusiastic about javascript. He advised me not to use it unless I really can't do without it. This doesn't mean all is wrong with it, but I managed to do without it up till now.
Using javascript for centering things seems unnecessary to me, so in this case I'd take care of html/css. You can validate your code [validator.w3.org...] once you have reorganised it and see what happens. You used align=center in tables and td. I remember having problem with that too.
A div is a better place to give directions for centering. Give it a class or id and put the specifications in your style-sheet. By using firebugs inspection of an element, you can see if the style rules are working the way you want and if you still have problems you have good information as to what part is causing problems.