A few points:

- 0px is an invalid style. It causes browser errors. Use 0 for values that are zero.

- Convert all size and alignment tag attributes to styles.

- Use classes, so each set of styles can be used on all tags needing it.

- Use relative sizes, as percentages of the width of the containing element.

- Don't place nonzero surrounding styles (margin. border, padding) and size styles (width, height) in the same tag or style. Putting them together causes browser incompatibilities, because IE nests them in the wrong order.

- Convert one property type at a time. Then test the changes.

- Use tables if you need a structure to hang together when the window size changes. Use divs if you want to allow the content to slide around for maximum visibility without horizontal scrolling.

- Don't use absolute positioning or styles, except for image sizes.

- Test the page with different browsers and screen resolutions. Also play with the browser window size (in restore down), to see what happens when the resolution or window size becomes small.

- Use the W3C validator page.