var topthumb = 1;
var scrollIntervalId;

function scrollThumbsDown() {
	if ((topthumb + maxthumbs - 1) == totalthumbs) return;
	
	topthumb++;
	
	scrollIntervalId = setInterval(scrolldown, 1);
}
function scrollThumbsUp() {
	if (topthumb == 1) return;
	
	topthumb--;
	
	scrollIntervalId = setInterval(scrollup, 1);
}
function scrolldown() {
	$('scroll').scrollTop += 5;
	
	if ( ($('scroll').scrollTop >= (((topthumb - 1) * 135) - 4)) && ($('scroll').scrollTop <= (((topthumb - 1) * 135) + 4)) ) clearInterval(scrollIntervalId);
}
function scrollup() {
	$('scroll').scrollTop -= 5;
	
	//if ($('scroll').scrollTop == ((topthumb - 1) * 135)) clearInterval(scrollIntervalId);
	if ( ($('scroll').scrollTop >= (((topthumb - 1) * 135) - 4)) && ($('scroll').scrollTop <= (((topthumb - 1) * 135) + 4)) ) clearInterval(scrollIntervalId);
}
function setPhoto(a) {
	if (!a) return;
	
	$('photo_img').src = 'project_images_display_image.php?ID=' + a.getAttribute('imgid');
	new Ajax.Updater('photo_text', 'project_images_display_notes.php?ID=' + a.getAttribute('imgid'), { asynchronous: false, evalScripts: true } );
}