var imageField		= new Array();
var currentImage	= 0;

(function initNeuroControls () {
	window.addEvent('domready', function(){
		// set up image blender
		$each($$("div#headPicture"), function(headerImageBlock, index){
			
			headerImageBlock.setStyle('position', 'relative');
			headerImageBlock.setStyle('top', 0);
			headerImageBlock.setStyle('left', 0);
				
			$each($$("div#headPicture img"), function(headerImage, index){
			 headerImage.setStyle('position', 'absolute');
			 headerImage.setStyle('top', 0);
			 headerImage.setStyle('left', 0);
				
			 if(index == 0){
				headerImage.setStyle('z-index', 30);
			 } else {
				headerImage.setStyle('z-index', (30 + index));
				headerImage.setStyle('opacity', 0);
				headerImage.setStyle('display', 'block');
				
				headerImage.set('tween', {duration: 2000});
				headerImage.set('id', ('imageBlender_' + index));
			 };
			 imageField.push(headerImage);
			});

			var blendImage = function(){ 
				var imageCount = imageField.length;

				currentImage ++;
				if(currentImage == imageCount) {
					for(imageIndex = 1; imageIndex < (imageCount-1); imageIndex ++)	{
						$('imageBlender_' + imageIndex).fade('hide');
					};
					$('imageBlender_' + (imageCount-1)).fade('out');
					currentImage = 0;
				} else
					$('imageBlender_' + currentImage).fade('in');
			};
			
			if(imageField.length > 1)
				blendImage.periodical(5000);
		});
	});
	
})();