jQuery(document).ready(function() {

	jQuery('#greenNav > li').each(function () {
		var time = 250; // speed of menu animation
		var hideDelay = 250; // delay for menu close

		var hideDelayTimer = null;
		
		// track state of menu
		var beingShown = false;
		var shown = false;
	
		var trigger = jQuery('a', this);
		var menu = jQuery('.Menu', this);
		
		var initialHeight = menu.height();
			
		// set the mouseover and mouseout on both element
		jQuery([trigger.get(0), menu.get(0)]).mouseover(function () {
			// 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;
		
				// set position of popup box
				menu.css({
					top: ( trigger.height() / 2 )+'px',
					left: '0px',
					height: '0px',
					display: 'block' // brings the popup back in to view
				})
		
				// (we're using chaining on the popup) now animate it's opacity and position
				.animate({
						top: '-'+ ( (initialHeight - trigger.height()) / 2 )+'px',
						height: initialHeight
					}, time, 'swing', function() {
					// once the animation is complete, set the tracker variables
					beingShown = false;
					shown = true;
				});
			}
		}).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;
				menu.animate({
						top: ( trigger.height() / 2 )+'px',
						height: '0px'
					}, 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)
					menu.css('display', 'none');
				});
			}, hideDelay);
		});
	});
	
});