Code:
<script>
// Used on the texture generator page
function buttonDown( event ) {
if (navigator.appName == 'Netscape'||navigator.appName=='Mozilla Firefox') button=event.which;
if (navigator.appName == 'Microsoft Internet Explorer') button = event.button;
}
function buttonUp( event ) {
button = 0;
}
</script>
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-137384-1";
urchinTracker();
</script>
it says something about buttons and diferent browsers 
