This chapter is from the book
Browser Hell
Web developers have hoped for years that eventually IE and Netscape would conform to the same standards. However, we now have Netscape 4.x, Netscape 6, and IE each commanding significant market share. These browsers act oddly at times, so keep your expectations low for writing code once and having it work as expected on all browsers. If it does, sacrifice a mouse to the browser Gods; they have been good to you.