onClick working in Gecko browsers, but not IE - php, google maps V3

I have built a Google maps app (v3) that uses some php to list database entries onto a page, the user can click an entry, triggering another another list being populated and also the map having markers added. This all works well in Firefox etc, but not in IE.

Reading through here and various forums I realise that onClick is the issue, however I am at a loss as to how to replace it.

$query = "SELECT Distinct WID, FirstN开发者_运维技巧ame, LastName FROM markers ORDER BY LastName asc";
$result = mysql_query ($query);

echo "<select style='font-weight:italic;width:220px;border:1px solid' size=12 id=authName></option>";
while($nt=mysql_fetch_array($result)){
echo "<option  value=$nt[WID] onclick=searchLocations() title='$nt[LastName]. $nt[FirstName]'>$nt[LastName]. $nt[FirstName]</option>";
}
echo "</select>;";

I use the value from [WID] to pass to the rest of the application. http://www.auneheadarts.org.uk/site/projects/wordquest/map_files/writer.php

what do you have set for searchLocations() ?!?

you can try

onclick='".searchLocations()."'