Rollover on feed results

JavaScript
1

How might a rollover be placed on the below, to output the DESCRIPTION field instead of printing it outright? One that will self-close.

Please note the table check 1st

$sql = "SELECT num FROM table";
    $result = mysql_query($sql);
    if (mysql_num_rows($result))
    {
     print "<br><a href='".$record["JOBNUMBER"]."'>".$record["TITLE"].</a>";
     print $record["DESCRIPTION"]."<br>";
}