Get A Select Box To Display Text From A Database In A Div Tag From The Select Box Populated By A While Loop

I'm trying to get a select box to display text from a database in a div tag from the select box populated by a while loop that also pulls from the database. The only way I can do this is from a javascript written by sending it over to a second page and I need it on just one page. Here is my code below:

<?php
session_start();
$q=$_GET["q"];
$num = $_GET['num'];
$test = $_GET['oneGram1'];
$_SESSION['oneGram']=$test;
[Code]...

Even if this is a wrong way to go about doing this can someone post just a simple script using a select box and displaying data on the same page?