(function($) {
	$.fn.parallaxSlider = function(options) {
	var opts = $.extend({}, $.fn.parallaxSlider.defaults, options);
	return this.each(function() {
			var $pxs_container 	= $(this),
			o   = $.meta ? $.extend({}, opts, $pxs_container.data()) : opts;

                        //the main slider
			var $pxs_slider		= $('.pxs_slider',$pxs_container),
			//the elements in the slider
			$elems			= $pxs_slider.children(),
			//total number of elements
			total_elems		= $elems.length,
			//the navigation buttons
			$pxs_next		= $('.pxs_next',$pxs_container),
			$pxs_prev		= $('.pxs_prev',$pxs_container),
			//the bg images
			$pxs_bg1		= $('.pxs_bg1',$pxs_container),
			$pxs_bg2		= $('.pxs_bg2',$pxs_container),
			$pxs_bg3		= $('.pxs_bg3',$pxs_container),
			//current image
			current			= 0,
			//the thumbs container
			//$pxs_thumbnails = $('.pxs_thumbnails',$pxs_container),
			//the thumbs
			//$thumbs			= $pxs_thumbnails.children(),
			//the interval for the autoplay mode
			slideshow,
			//the loading image
			$pxs_loading	= $('.pxs_loading',$pxs_container),
			$pxs_slider_wrapper = $('.pxs_slider_wrapper',$pxs_container);
			//first preload all the images
        		var loaded = 0,
			$images	= $pxs_slider_wrapper.find('img');

                     //alert($pxs_slider);
                                           /* $.each($pxs_thumbnails, function(key, value) {
                                             alert(key + ': ' + value);
                                                $.each(value, function(key, value) {
                                                alert(key + ': ' + value);

                                            });
                                            });*/

			$images.each(function(){
        				var $img	= $(this);           
                                   

                			$('<img/>').load(function(){
            				++loaded;
                                        
					if(loaded == total_elems*2){                        			
                                                $pxs_loading.hide();
						$pxs_slider_wrapper.show();
        					//one images width (assuming all images have the same sizes)
						var one_image_w	= $pxs_slider.find('img:first').width();
                                       
						/*
                								need to set width of the slider,
                                						of each one of its elements, and of the
                                                        			navigation buttons
                                                                                 */
                                             setWidths($pxs_slider,$elems,total_elems,$pxs_bg1,$pxs_bg2,$pxs_bg3,one_image_w,$pxs_next,$pxs_prev);

                                             //make the first thumb be selected
					     //highlight($thumbs.eq(0));
                                             //slide when clicking the navigation buttons controlla le frecce andrea 15-02-11
									$pxs_next.bind('click',function(){
										++current;
										if(current >= total_elems)
											if(o.circular)
												current = 0;
										else{
											--current;
											return false;
										}
										//highlight($thumbs.eq(current));
										slide(current,
										$pxs_slider,
										$pxs_bg3,
										$pxs_bg2,
										$pxs_bg1,
										o.speed,
										o.easing,
										o.easingBg);
									});
									$pxs_prev.bind('click',function(){
										--current;
										if(current < 0)
											if(o.circular)
												current = total_elems - 1;
										else{
											++current;
											return false;
										}
										//highlight($thumbs.eq(current));
										slide(current,
										$pxs_slider,
										$pxs_bg3,
										$pxs_bg2,
										$pxs_bg1,
										o.speed,
										o.easing,
										o.easingBg);
									});
                                                                        //fine
								



									/*
									activate the autoplay mode if
									that option was specified
									 */
									if(o.auto != 0){
										o.circular	= true;
										slideshow	= setInterval(function(){
											$pxs_next.trigger('click');
										},o.auto);
									}

									/*
									when resizing the window,
									we need to recalculate the widths of the
									slider elements, based on the new windows width.
									we need to slide again to the current one,
									since the left of the slider is no longer correct
									 */
									$(window).resize(function(){
										w_w	= $(window).width();
										setWidths($pxs_slider,$elems,total_elems,$pxs_bg1,$pxs_bg2,$pxs_bg3,one_image_w,$pxs_next,$pxs_prev);
										slide(current,
										$pxs_slider,
										$pxs_bg3,
										$pxs_bg2,
										$pxs_bg1,
										1,
										o.easing,
										o.easingBg);
									});

								}
							}).error(function(){
								
							}).attr('src',$img.attr('src'));
						});



					});
				};

				//the current windows width
				var w_w	= $(window).width();

				var slide= function(current,
				$pxs_slider,
				$pxs_bg3,
				$pxs_bg2,
				$pxs_bg1,
				speed,
				easing,
				easingBg){
					var slide_to	= parseInt(-w_w * current);
					$pxs_slider.stop().animate({
						left	: slide_to + 'px'
					},speed, easing);
					$pxs_bg3.stop().animate({
						left	: slide_to/2 + 'px'
					},speed, easingBg);
					$pxs_bg2.stop().animate({
						left	: slide_to/4 + 'px'
					},speed, easingBg);
					$pxs_bg1.stop().animate({
						left	: slide_to/8 + 'px'
					},speed, easingBg);
				}

				var highlight		= function($elem){
					$elem.siblings().removeClass('selected');
					$elem.addClass('selected');
				}

				var setWidths		= function($pxs_slider,
				$elems,
				total_elems,
				$pxs_bg1,
				$pxs_bg2,
				$pxs_bg3,
				one_image_w,
				$pxs_next,
				$pxs_prev){
					/*
					the width of the slider is the windows width
					times the total number of elements in the slider
					 */
					var pxs_slider_w	= w_w * total_elems;
					$pxs_slider.width(pxs_slider_w + 'px');
					//each element will have a width = windows width
					$elems.width(w_w + 'px');
					/*
					we also set the width of each bg image div.
					The value is the same calculated for the pxs_slider
					 */
					$pxs_bg1.width(pxs_slider_w + 'px');
					$pxs_bg2.width(pxs_slider_w + 'px');
					$pxs_bg3.width(pxs_slider_w + 'px');

					/*
					both the right and left of the
					navigation next and previous buttons will be:
					windowWidth/2 - imgWidth/2 + some margin (not to touch the image borders)
					 */
					//alert(w_w);
                                        //640
                                        //var position_nav	= w_w/2 - one_image_w/2 + 3;
                                        // ricalcolo la posizione delle frecce per mantenerle alle estremità della div andrea 10.02.11
                                        var position_nav1 = (w_w/2);
                                        position_nav1 = position_nav1+(position_nav1 * 65/100);
		                        $pxs_next.css('left',  position_nav1 + 'px');
					$pxs_prev.css('right',   position_nav1 + 'px');                                       
				}

				$.fn.parallaxSlider.defaults = {
					auto			: 0,	//how many seconds to periodically slide the content.
											//If set to 0 then autoplay is turned off.
					speed			: 1000,//speed of each slide animation
					easing			: 'jswing',//easing effect for the slide animation
					easingBg		: 'jswing',//easing effect for the background animation
					circular		: true,//circular slider
					thumbRotation	: false//the thumbs will be randomly rotated
				};
				//easeInOutExpo,easeInBack
			})(jQuery);



			$(function() {
				var $pxs_container	= $('#pxs_container');
				$pxs_container.parallaxSlider();
			});