Other Web Design Basics
Cross browser compatibility
People will view your site using different browsers. Different browsers can display your page in different ways. You should check how your site appears in at least Internet Explorer and Firefox. This can be a particular problem when you are positioning elements using CSS, as IE implements the CSS box model differently than the W3C standard used by other browsers. You may need to make various small changes to your style sheets to achieve the same display between browsers.Screen resolution compatibility
Screen resolution refers to the number of pixels in width and height that a computer screen displays. The most common resolutions are 800 x 600, and 1024 x 768, although there are smaller (640 x 480) and larger (1280 x 800) options.You should bear these numbers in mind when designing the size and positioning of elements on your page. You should aim to make your site display correctly for a minimum resolution of 800 x 600, as smaller screen resolutions are so rare now that it is acceptable to ignore them.
Ignoring the differences in screen resolutions can result in users having to scroll left and right, as well as up and down to read all of your content. People are more likely to find a site where they do not have to do this, regardless of the value of your content.