You could also do this with frames

Here you go:

<script type="text/javascript">
function validator(){
var valid = true;
if (document.form1.textMessage.value=='')
{...

Narrow down the problem and post the code. Most of us aren't going to download your code.

The script above performs a query but doesn't output anything. You will need an output from the script to populate the suggestions. What does the demo script look like?

No, with AJAX, JDOMP, or Flash, the url is never seen. The request is sent "behind the scenes". The user doesn't see any change in the url throughout the data exchange. Here...

If it's in the query string (myscript.php?myvar=value), you use get:
$var=$_GET['myvar'];
You can put as many variables as needed into the query...

You could do this a number of ways. The easiest, in my opinion would be Flash (http://www.adobepress.com/articles/article.asp?p=464427&seqNum=1).
However, if Flash isn't an option, JDOMP...

Shouldn't
for (var counter=0; counter<theForm.del.length; counter++)
be
for (var counter=0; counter<theForm.del.length; counter++){
and
return(true); should be return filledIn;

No, don't edit anything except for display_date on line 2 and link location in line 10. The rest of the script is how JavaScript reads the current date from your machine.

JavaScript will do this. HTML can't make decisions based on the date. A Server side script would be even better because the user can't disable it the way they can JavaScript. Anyway, here you go:
...