function getTargetByEvent(e)
{var targ;if(!e)
var e=window.event;if(e.target)targ=e.target;else if(e.srcElement)targ=e.srcElement;{if(targ.nodeType==3)
targ=targ.parentNode;}
return targ;}

function enablePhotoSwitcher()
{
   var photoLinks = document.getElementById( 'photo_links' ).getElementsByTagName( 'a' );
   for ( var i=0; i<photoLinks.length; i++ )
   {
      photoLinks[i].onclick = handlePhotoSwitch;
   }
}

function handlePhotoSwitch( e )
{
	var photoLink = getTargetByEvent( e );
   var photos = document.getElementById( 'photo_switcher' ).getElementsByTagName( 'img' );
   for ( var i=0; i<photos.length; i++ )
	{
      if ( photos[i].src == photoLink.href )
      {
         photos[i].className = 'selected';
      }
      else
      {
         photos[i].className = '';
      }
	}
	var photoLinks = document.getElementById( 'photo_links' ).getElementsByTagName( 'a' );
	for ( var i=0; i<photoLinks.length; i++ )
	{
		photoLinks[i].className = '';
	}
	photoLink.className = 'selected';
	return false;
}