I’ve noticed over the years that there are a lot of websites that consist of horrendous code. I just never understood why people fail to validate their code. Writing error-free HTML is the best way to help ensure that pages render optimally in as many browsers as possible. This includes older, as well as, future browsers. I’m sure you’ve heard the old saying, “Measure twice, cut once.” It goes the same with writing code: Write it right the first time and write it once. Write it wrong, and you will probably end up writing it again later.