Many people are not aware that different web browsers may display your website differently if it is not properly coded in the back end. Internet Explorer (IE), Mozilla Firefox, Safari, and Google Chrome are some of the top browsers in terms of market share (96.9% of the market in Sept. 09 according to w3schools.com). The issue is that there is no set of standards for how the browser displays all aspects of your web page’s HTML code. Some browsers make assumptions about HTML code that is not defined while others do not. This can create very big issues for poorly designed websites. Users may be taken back when things are out of place or the template gets distorted in a way outside of the designer’s initial intent.
The way to test is easy, pull up your website in each of the 4 major browsers and look for any differences in the page design. A well coded website should not display any differences. If you come across major elements of a page being out of place, it is directly related to a poorly coded website.