(function($) {
		$.imagezoom = {};
		
		$.imagezoom._close_handler = false;
		$.imagezoom._all_images = [];
		$.imagezoom._ctl_count = 0;
		$.imagezoom._defaults = {
				defaultWidth: 300,
				defaultHeight: 300,
				dimSpeed: 100,
				zoomAnimSpeed: 100,
				padding: 20,
				dimOpacity: 0.5,
				removeScroll: false
			};


		$.imagezoom.settings = {};
//		$.filelib._inst = null;
	
		
		$.fn.extend({
				imagezoom: function(settings) {
						
						$.imagezoom.settings = $.extend({}, $.imagezoom._defaults, settings);
						
						return this.each(function() {
								var t = $(this); 

								if(this.tagName == 'IMG') {
									var lnk = t.attr('longdesc');

									t.wrap('<A href="' + lnk + '"></a>');

									t = t.parent(); 
								}

								$.imagezoom._all_images.push(t);
								
								if(!t.attr('id')) {
									t.attr('id', '__imagezoom-' + ($.imagezoom._ctl_count++));								
								}

								t.click(function() {
										$.imagezoom.openImagezoom(t);
										return false;
									});
								
							});
					}
			});


		function dimScreenOn(callback)
		{
			if($('#__dimScreen').length > 0 ) {
				if(typeof callback == 'function') { 
					callback();
				}
				
				return;
			}
			
			if($.imagezoom.settings.removeScroll) {
				$('BODY').css('overflow', 'hidden');
			}
					
			$('<DIV />').
				attr({id: '__dimScreen'}).
				css({
						background: '#000',
						height: $(document).height(),
						left: '0px',
						opacity: 0,
						position: 'absolute',
						top: '0px',
						width: $(window).width(),
						zIndex: 1999
				    }).
				appendTo(document.body).
				fadeTo($.imagezoom.settings.dimSpeed, $.imagezoom.settings.dimOpacity, callback);		

	        $(window).resize(function() {
					$('#__dimScreen').css({
				            height: $(document).height(),
				            width: $(window).width()
						});
				});
		}

		
		function dimScreenOff(callback)
		{
			$('#__dimScreen').fadeOut($.imagezoom.settings.dimSpeed, function() {
			    	$(this).remove();
			    	
					if($.imagezoom.settings.removeScroll) {
						$('BODY').css('overflow', 'auto');
					}
					
					if(typeof callback == 'function') { 
						callback();
					}
				});
		}
		
		
		$.imagezoom.openImagezoom = function(t) {
				
				var tc = null;
				var n = null;
				var p = null;
				
				for(tc in $.imagezoom._all_images) {
					if($.imagezoom._all_images[tc].attr('id') == t.attr('id')) {
						tc = parseInt(tc, 0);
						if($.imagezoom._all_images[tc + 1]) {
							n = $.imagezoom._all_images[tc + 1];
						}
			
						if($.imagezoom._all_images[tc - 1]) {
							p = $.imagezoom._all_images[tc - 1];
						}
					}
				}

				dimScreenOn(function() {
						var w_w = $(window).width();
						var w_h = $(window).height();
						
						var i_w = $.imagezoom.settings.defaultWidth - $.imagezoom.settings.padding * 2;
						var i_h = $.imagezoom.settings.defaultHeight - $.imagezoom.settings.padding * 2;
						
						var description = t.find('IMG').attr('alt');
						description = description.replace(/\n/g, '<br />');
						
						var toolbar_h = 0;
						var imgc = $('#imagezoom-c');
						
						//return;	
						if(imgc.length == 0) {
							imgc = $('<DIV id="imagezoom-c" class="loading"><DIV id="imagezoom-toolbar">' +
									'<DIV id="imagezoom-nav"><DIV id="imagezoom-prev" class="nav"><a href="javascript://">&larr;</a></DIV>' +
									'<DIV id="imagezoom-description"></DIV>' + 
									'<DIV id="imagezoom-next" class="nav"><a href="javascript://">&rarr;</a></DIV></DIV>' + 
									'</DIV></DIV>').
								appendTo(document.body);
							
							imgc.css({
										width: i_w + 'px', 
										height: i_h + 'px', 
										left: (Math.round(w_w / 2) - Math.round(i_w / 2)) + 'px', 
										top: ($(window).scrollTop() + Math.round((w_h - i_h) / 2)) + 'px'
									});
						}
						else {
							imgc.addClass('loading');
						}
						
						$('#imagezoom-description').
							css({marginLeft: p ? $('#imagezoom-prev').width() + 20 : 0, marginRight: n ? $('#imagezoom-next').width() + 20 : 0}).
							html(description);
						
						toolbar_h = Math.max($('#imagezoom-description').outerHeight(true), $('#imagezoom-next').outerHeight(true));

						$('#imagezoom-img').remove();
						$('#imagezoom-toolbar').hide();
						
						var img_obj = new Image();

						$(img_obj).load(function() {
								var iw = img_obj.width;
								var ih = img_obj.height;
								var w = iw;
								var h = ih + toolbar_h + $.imagezoom.settings.padding;
								
								imgc.animate({
										left: Math.round((w_w - w) / 2) + 'px', 
										top: ($(window).scrollTop() + Math.round((w_h - h) / 2)) + 'px',
										width: w + 'px',  
										height: h + 'px'  
									}, 
									$.imagezoom.settings.zoomAnimSpeed,
									'swing',
									function() {
											imgc.removeClass('loading');
											
											var img_el = $('<IMG id="imagezoom-img" src="' + img_obj.src + '" width="' + iw + '" height="' + ih + '" alt="" style="display: none;"/>').
												prependTo(imgc);
											
											img_el.
												fadeIn($.imagezoom.settings.zoomAnimSpeed * 3).
												bind('click', function() {
														$.imagezoom.closeImagezoom();	
													});
											
											if(n) {
												$('#imagezoom-next A').unbind('click').click(function() {
														$.imagezoom.openImagezoom(n);	
													});
												$('#imagezoom-next').show();
											}
											else {
												$('#imagezoom-next').hide();
											}
											
											if(p) {
												$('#imagezoom-prev A').unbind('click').click(function() {
														$.imagezoom.openImagezoom(p);	
													});
												$('#imagezoom-prev').show();
											}
											else {
												$('#imagezoom-prev').hide();
											}
											
											if(description) {
												$('#imagezoom-description').show();
											}
											else {
												$('#imagezoom-description').empty();
											}
											
											if(toolbar_h > 0) {
												$('#imagezoom-toolbar').show();
											}
										});
							}); 

						img_obj.onerror = function() {
								$.imagezoom.closeImagezoom();
							};
					
						img_obj.src = t.attr('href');
					});
	
				if(!$.imagezoom._close_handler) {
					$('#__dimScreen').click(function() {
								$.imagezoom.closeImagezoom();
							});
				
					$(document).keydown(function(e) {
							var key = (window.event) ? event.keyCode : e.keyCode;
							var esc_code = 27;
							
							if(key == esc_code && $('#imagezoom-c').length > 0) {
								$.imagezoom.closeImagezoom();
							}
							
							$.imagezoom._close_handler = true;
						});
				}
			};		


		$.imagezoom.closeImagezoom = function(callback)	{
				$('#imagezoom-c').remove();
			
				dimScreenOff(callback);
			};

	})(jQuery);