Having a website look the same on different browsers has been an ongoing issue for the web designers all over the world. The reason is simple - the visualization of a website depends on many different variables such as:
- The visitor's OS (operating system)
If your website uses submit buttons, radio buttons, check boxes and edit fields, all of them will be visualized depending on the visitor's OS and its style. For example, a submit button can look like a gray rectangle on your Windows Classic theme, and like an oval if you use the XP style. As a workaround, you can create custom buttons for your website.
- The visitor's display resolution
Display resolution is affecting quite a lot the way a website is displayed. For example, if you create your pages at 1024x768 they will not fit into the screen of a visitor that has set his/her resolution to 800x600.
In order to fix this, you should not use static dimensions for your website, i.e. instead of setting width = 1024px you can use width = 100%. This will not fix all issues but at least will make the page fit into the screen.
- How the browser interprets the page
Web browsers do not render pages pixel by pixel. They read the entire code and produce an output depending on your code. There are, however, differences in the code interpretation. Therefore you should check the way your website looks on different browsers and operating systems.