(function($) {
		function fixTitle($ele) {
			if ($ele.attr('title') || typeof($ele.attr('original-title')) != 'string') {
				$ele.attr('original-title', $ele.attr('title') || '').removeAttr('title');
			}
		}
		
		$.fn.tipsy = function(options) {

			options = $.extend({}, $.fn.tipsy.defaults, options);
			
			return this.each(function() {
				
				fixTitle($(this));
				var opts = $.fn.tipsy.elementOptions(this, options);
				var timeout = null;
				
				$(this).hover(function() {
					var self = this;
					timeout = setTimeout(function() {
						$.data(self, 'cancel.tipsy', true);

						var tip = $.data(self, 'active.tipsy');
						if (!tip) {
							tip = $('<div class="tipsy"><div class="tipsy-inner"/></div>');
							tip.css({position: 'absolute', zIndex: 100000});
							$.data(self, 'active.tipsy', tip);
						}

						fixTitle($(self));

						var title;
						if (typeof opts.title == 'string') {
							title = $(self).attr(opts.title == 'title' ? 'original-title' : opts.title);
						} else if (typeof opts.title == 'function') {
							title = opts.title.call(self);
						}

						tip.find('.tipsy-inner')[opts.html ? 'html' : 'text'](title || opts.fallback);

						var pos = $.extend({}, $(self).offset(), {width: self.offsetWidth, height: self.offsetHeight});
						tip.get(0).className = 'tipsy'; // reset classname in case of dynamic gravity
						tip.remove().css({top: 0, left: 0, visibility: 'hidden', display: 'block'}).appendTo(document.body);
						var actualWidth = tip[0].offsetWidth, actualHeight = tip[0].offsetHeight;
						var gravity = (typeof opts.gravity == 'function') ? opts.gravity.call(self) : opts.gravity;

						switch (gravity.charAt(0)) {
							case 'n':
								tip.css({top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-north');
								break;
							case 's':
								tip.css({top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}).addClass('tipsy-south');
								break;
							case 'e':
								tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}).addClass('tipsy-east');
								break;
							case 'w':
								tip.css({top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}).addClass('tipsy-west');
								break;
						}

						if (opts.fade) {
							tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: opts.opacity});
						} else {
							tip.css({visibility: 'visible', opacity: opts.opacity});
						}
					}, opts.delayIn);

				}, function() {
					$.data(this, 'cancel.tipsy', false);
					var self = this;
					clearTimeout(timeout);
					setTimeout(function() {
						if ($.data(this, 'cancel.tipsy')) return;
						var tip = $.data(self, 'active.tipsy');
						if (opts.fade) {
							tip.stop().fadeOut(function() { $(this).remove(); });
						} else if (tip) {
							tip.remove();
						}
					}, opts.delayOut);

				});
				
			});
			
		};
		
		// Overwrite this method to provide options on a per-element basis.
		// For example, you could store the gravity in a 'tipsy-gravity' attribute:
		// return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' });
		// (remember - do not modify 'options' in place!)
		$.fn.tipsy.elementOptions = function(ele, options) {
			return $.metadata ? $.extend({}, options, $(ele).metadata()) : options;
		};
		
		$.fn.tipsy.defaults = {
			delayIn: 0,
			delayOut: 100,
			fade: false,
			fallback: '',
			gravity: 'n',
			html: false,
			opacity: 0.8,
			title: 'title'
		};
		
		$.fn.tipsy.autoNS = function() {
			return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
		};
		
		$.fn.tipsy.autoWE = function() {
			return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
		};
		
	})(jQuery);