change logo on click

[gncreditcards]

How i do ?

I want every change city, change the logo to new logo to the city


<?php
if($sef_urls) $url = "{$vbasedir}{$xcityid}_".RemoveBadURLChars($xcityn ame)."/";
else $url = "?view=main&cityid=$xcityid";
?>
<a href="<?php echo $url; ?>">
<img src="images/logo.gif" border="0"><br>
<?php echo $xcityid>0?"$xcityname, $xcountryname":$xcountryname; ?></a>
</div>

[psychdev]

try:

echo "<img src='".$city1.".jpg' onmousedown='this.src=".$city2.".png' />";

this will change the image when you click.. but then you will have to change the values of city1 and city2 or come up with a different way.. but.. make sense?