/* <![CDATA[ */


(function($) {
	$.fn.lazyload = function(options) {
		var settings = {
			threshold		: 0,
			failurelimit	: 0,
			event			: "scroll",
			effect			: "show",
			container		: window
			};
		if (options) {
			$.extend(settings, options);
			}
		var elements = this;
		if ("scroll" == settings.event) {
			$(settings.container).bind("scroll", function(event) {
				var counter = 0;
				elements.each(function() {
					if (!$.belowthefold(this, settings) && !$.rightoffold(this, settings)) {
						$(this).trigger("appear");
						} else {
						if (counter++ > settings.failurelimit) return false;
						}
					});
				var temp = $.grep(elements, function(element) { return !element.loaded; });
				elements = $(temp);
				});
			}
		return this.each(function() {
			var self = this;
			$(self).attr("original", $(self).attr("src"));
			if ("scroll" != settings.event || $.belowthefold(self, settings) || $.rightoffold(self, settings)) {
				if (settings.placeholder) {
					$(self).attr("src", settings.placeholder);
					} else {
					$(self).removeAttr("src");
					}
				self.loaded = false;
				} else {
				self.loaded = true;
				}
			$(self).one("appear", function() {
				if (!this.loaded) {
					$("<img />").bind("load", function() {
						$(self).hide().attr("src", $(self).attr("original"))[settings.effect](settings.effectspeed);
						self.loaded = true;
						}).attr("src", $(self).attr("original"));
					};
				});
			if ("scroll" != settings.event) {
				$(self).bind(settings.event, function(event) {
					if (!self.loaded) {
						$(self).trigger("appear");
						}
					});
				}
			});
		};

	$.belowthefold = function(element, settings) {
		if (settings.container === undefined || settings.container === window) {
			var fold = $(window).height() + $(window).scrollTop();
			} else {
			var fold = $(settings.container).offset().top + $(settings.container).height();
			}
		return fold <= $(element).offset().top - settings.threshold;
		};
	$.rightoffold = function(element, settings) {
		if (settings.container === undefined || settings.container === window) {
			var fold = $(window).width() + $(window).scrollLeft();
			} else {
			var fold = $(settings.container).offset().left + $(settings.container).width();
			}
		return fold <= $(element).offset().left - settings.threshold;
		};

	$.extend($.expr[':'], {
		"below-the-fold" : "$.belowthefold(a, {threshold : 0, container: window})",
		"above-the-fold" : "!$.belowthefold(a, {threshold : 0, container: window})",
		"right-of-fold"  : "$.rightoffold(a, {threshold : 0, container: window})",
		"left-of-fold"   : "!$.rightoffold(a, {threshold : 0, container: window})"
		});

	})(jQuery);


/* ]]> */