function switchlayersection (sectionlayername) 
{
// turn off all layers
if ( $('pdevent_dates') ) $('pdevent_dates').hide();
if ( $('pdevent_map') ) $('pdevent_map').hide();
if ( $('pdevent_performer') ) $('pdevent_performer').hide();
if ( $('pdevent_sports') ) $('pdevent_sports').hide();
if ( $('pdevent_photos') ) $('pdevent_photos').hide();
if ( $('pdevent_comments') ) $('pdevent_comments').hide();

if ( $('pdevent_datesTab') ) $('pdevent_datesTab').removeClassName('selected');
if ( $('pdevent_mapTab') ) $('pdevent_mapTab').removeClassName('selected');
if ( $('pdevent_performerTab') ) $('pdevent_performerTab').removeClassName('selected');
if ( $('pdevent_sportsTab') ) $('pdevent_sportsTab').removeClassName('selected');
if ( $('pdevent_photosTab') ) $('pdevent_photosTab').removeClassName('selected');
if ( $('pdevent_commentsTab') ) $('pdevent_commentsTab').removeClassName('selected');

//turn on layer you want to display
if ( $(sectionlayername) ) $(sectionlayername).show();
if ( $(sectionlayername+'Tab') ) $(sectionlayername+'Tab').addClassName('selected');

if($('mapControl')){
if ( sectionlayername=='pdevent_map' )
	$('mapControl').show();
else
	$('mapControl').hide();
}
}