The document.write statement was a big part of being able to use JavaScript to update web pages back when JavaScript was first created. Modern web browsers provide much better less obtrusive ways of doing the same updates. Here are some instructions on how you can update your web pages to replace the document.write statements with innerHTML calls instead which will allow you to consolidate all your scripts to the bottom of the page instead of having scripts scattered throughout the HTML.

Getting Rid of document.write

JavaScript includes a number of constructs that have either been superseded by something better or which seemed like a good idea to those who created JavaScript in the first place but which have turned out to be more trouble than they are worth. Here are some of the JavaScript constructs you should avoid as well as some that can be problematic if not used properly (so you should avoid them where possible as well).

The Bad Parts of JavaScript

The fifteenth tutorial on Regular Expressions introduces Back References - this is a way to refer back to a previous section of the string that you have already matched to the pattern. Any section of the string that is matched by a group is automatically added to an array of back references.

Back References

Email programs are very different to Web Browsers regarding JavaScript. One format that most email programs support to send emails in is HTML. Just because you can use HTML in emails though doesn't mean that you can also use JavaScript as well. Yes some email programs do support JavaScript but there are some very good reasons why you should disable JavaScript in your email program if it hasn't already done that for you.

JavaScript and Emails