Get Google Maps Latitude / Longitude And Output In Table

I'm currently using some code that takes the latitude and longitude from a Google map and outputs it in a table when the user drags a marker on the map. I previously had it working that the outputted latitude and longitude appeared in an input box but I can no longer get this to work again.

I have posted the Javascript code below.
<script type="text/javascript">
function load() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());
var center = new GLatLng(55.54555, -3.39634 );
map.setCenter(center, 15);
geocoder = new GClientGeocoder(); .....

This is the table I output the latitude and longitude to
<table class="latlontable" style="float:left">
<tr><td width="100"><b>Latitude</b></td>
<td id="lat" name="lat"></td></tr>
<tr><td width="100"><b>Longitude</b></td>
<td id="lng" name="lng"></td>
</tr></table>