var loading = "<center><img src = '/images/loading3.gif'/></center>";
$(document).ready(function(){
	//process_scroll();
	$(window).scroll(function(){
		process_scroll();        
	});
});

function loadRow(offset,media_vfolder_ide,photog_event_ide,parent){
	var ajaxpath = '/'+$('#market_slug').val()+'/photos/ajax/album-row';
	$.post(ajaxpath,{
		offset:offset,
		media_vfolder_ide:media_vfolder_ide,
		photog_event_ide:photog_event_ide
	},function(data){
		if (data) parent.html(data);
		else parent.hide();
		process_scroll();
	});
}
function process_scroll(){
	
	var photog_event_ide = $('#photog_event_ide').val();
	var media_vfolder_ide = $('#media_vfolder_ide').val();
	var window_h = $(window).height();
	var document_h = $(document).height();
	var pos = $(window).scrollTop();
	var photos_h = $('#photos').height();
	var photos_pos = $('#photos').position();
	var photos_top = photos_pos.top;
	var photos_end = photos_top+photos_h - 450; 
	var div =  $('.offset:first');
	//console.log('#window_h: '+window_h+'#document_h:'+document_h+'#pos:'+pos+'#photos_end:'+photos_end);
	if((window_h+pos>photos_end && div.length>0) || (div.length>0 && window_h>=photos_end)){
		var offset = div.val();
		var parent = div.parent();
		parent.html(loading).css({'height':'150px'});
		loadRow(offset,media_vfolder_ide,photog_event_ide,parent);
	}
}