newbie needing help with a select box

[dwilson]

I have a form with a select box, in the select box is account numbers. the select box works fine but I want to add a text field next to it and display a description of the account when a user clicks on a certain account number. how can I accomplish this
The code for my select drop box is as follows:
if (!$cn == False) {

mysql_select_db("test");

$sql = "select account_number,

account_name

from tbl_accounts";

$result = mysql_query($sql,$cn);

print "<select name='acctnum'>";

while ($row = mysql_fetch_array($result)) {

print "<option>".$row['account_number']."</option>";

}

print "</select>";

mysql_close($cn);

}

[tuf-web_co_uk]

well basically what your looking for is html and javascript, not php.
apart from the variable $row['description']

i dont know much about javascript but when the select from is clicked it will probably have to run a code like this

window.document.myform.textbox.value="$row['description']"