(function ($) {
	$.fn.bubble = function () {

		// options
		var time = 1000;
		var hideDelay = 500;
		
		var hideDelayTimer = null;
	
		// tracker
		var beingShown = false;
		var shown = false;
		
		var trigger = $('.trigger', this);
		var popup = $('.popup', this).css('opacity', 0);
		
		var popupHeight = popup.height()+5;    
		
		// Disable click event
		$([trigger.get(0)]).click(function(e){e.preventDefault();});
		
		// set the mouseover and mouseout on both element
		$([trigger.get(0), popup.get(0)]).mouseover(function (e) {
		  // stops the hide event if we move from the trigger to the popup element
		  if (hideDelayTimer) clearTimeout(hideDelayTimer);
	
		  // don't trigger the animation again if we're being shown, or already visible
		  if (beingShown || shown) {
			return;
		  } else {
			beingShown = true;

			// reset position of popup box
			popup.css({
			  top: -popupHeight,
			  left: 0,
			  display: 'block' // brings the popup back in to view
			})
			
			// (we're using chaining on the popup) now animate it's opacity and position
			.animate({
			  opacity: 1
			}, time, 'linear', function() {
			  // once the animation is complete, set the tracker variables
			  beingShown = false;
			  shown = true;

			})
		  };			 
		  if (e.clientY < popupHeight+30) $('html,body').animate({scrollTop:popup.offset().top},time);			
		}).mouseout(function () {
		  // reset the timer if we get fired again - avoids double animations
		  if (hideDelayTimer) clearTimeout(hideDelayTimer);
		  
		  // store the timer so that it can be cleared in the mouseover if required
		  hideDelayTimer = setTimeout(function () {
			hideDelayTimer = null;
			popup.animate({
			  opacity: 0
			}, time, 'swing', function () {
			  // once the animate is complete, set the tracker variables
			  shown = false;
			  // hide the popup entirely after the effect (opacity alone doesn't do the job)
			  popup.css('display', 'none');
			});
		  }, hideDelay);
		});
	  }
})(jQuery);