Several facts:

- The viewport height is not normally something the page rendering engine takes into account. It is expected to place things against the top, and then add them on downward until it runs out of material. The emphasis is in fitting things to the page horizontally. If it won't fit, the page expands downward.

- Vertical centering is not generally provided, because of the above, and because different computers have different screen resolutions.

- It is almost impossible to make something exactly fit a page in all browsers, screen resolutions, font size settings, opened window sizes, and browser defaults.

- You can define styles for the td and th tags setting the text-align and vertical-align styles to what you want. This overrides the browser defaults.

- To keep stuff from rendering different between IE and FF, do not put size styles (height and width) and nonzero surrounding styles (margin, border, and padding) in the same tags or styles. IE and FF render them in the opposite nesting order. Use two nested tag pairs to specify the order they will be applied.

I suggest that you center things horizontally, and let the vertical parts end up where they do. Busting your buttons over trying to center stuff on the page vertically in all browsers and window sizes is a waste of time.

is Not standard anymore? Because thats always worked in both browsers for me. Assuming all the content is inside one main table.

Use styles instead of center or align=center.

Its a pain I have been searching on the internet, like midimagic said "there is no solution".

So just do your best I guess

Thanks anyways, people.

This code would indeed center the contents horizontally, but I use
to center both horizontally and vertically. When the window changes size, the content adjusts to remain centered. It works in IE and FF , but not sure if this is the way you would go about properly aligning multiple-celled tables though...

Ya thats sorta cheating as I was hoping to find a css solution but pretty much thats what I have had to end up resorting to, but thanks

You've tried:

table{
position:absolute;
left:25%;
}

right?

Horizontal centering is easy, if you don't have size styles (height, width) and nonzero surrounding styles (margin, border, padding) applied to the same tag. Nest two tags if you need both.

The Internet is not designed for vertical centering. Web pages are designed to expand downward when they need more room. Add in different screen resolutions and window sizes (The browser might be restored down - and don't forget Web TV's 320x192 pixel screen), and the impossibility of vertical centering is quite evident.