// wrap as a jQuery plugin and pass jQuery in to our anoymous function
(function ($) {
    $.fn.cross = function (options) {
        return this.each(function (i) { 
            // cache the copy of jQuery(this) - the start image
            var $$ = $(this);
            var heightToSet,heightToSet1,heightToSet2;
            // get the target from the backgroundImage + regexp
            var target = $$.css('backgroundImage').replace(/^url|[\(\)'"]/g, '');

            // nice long chain: wrap img element in span
            $$.wrap('<span style="position: relative;"></span>')
                // change selector to parent - i.e. newly created span
                .parent()
                // prepend a new image inside the span
                .prepend('<img style = "opacity: 0" class = "fade2">')
                // change the selector to the newly created image
                .find(':first-child')
                // set the image to the target
                .attr('src', target);

            // the CSS styling of the start image needs to be handled
            // differently for different browsers
            
           
            if ($.browser.msie) {
                $$.css({
                    'position' : 'absolute', 
                    'left' :  ($$.parent().children('.fade2').width()/2) - ($$.width() / 2) + "" + "px",
                    'background' : ''
                });
                
                $$.parent().children('.fade2').stop().animate({
                    opacity: 0
                }, 1);       
                

            }

            else if ($.browser.mozilla) {
                $$.css({
                    'position' : 'absolute', 
                    'left' :  ($$.parent().children('.fade2').width()/2) - ($$.width() / 2) + "" + "px",
                    'background' : ''
                    //'top' : this.offsetTop
                });
                } else if ($.browser.opera && $.browser.version < 9.5) {
                // Browser sniffing is bad - however opera < 9.5 has a render bug 
                // so this is required to get around it we can't apply the 'top' : 0 
                // separately because Mozilla strips the style set originally somehow...                    
                $$.css({
                    'position' : 'absolute', 
                    'left' :  ($$.parent().children('.fade2').width()/2) - ($$.width() / 2) + "" + "px",
                    'background' : ''
                    //'top' : "0"
                });
            } else { // Safari
                $$.css({
                    'position' : 'absolute', 
                    'left' :  ($$.parent().children('.fade2').width()/2) - ($$.width() / 2) + "" + "px",
                    'background' : ''
                });
            }
            
            heightToSet1 = $$.height() > $$.parent().parent().parent().children('#box_realizacje_img_img').height(heightToSet1) ? ($$.height() + 8) :($$.parent().parent().parent().children('#box_realizacje_img_img').height(heightToSet1) + 8);            
            if(heightToSet1) $$.parent().parent().parent().children('#box_realizacje_img_img').height(heightToSet1);
            
            // similar effect as single image technique, except using .animate 
            // which will handle the fading up from the right opacity for us
            $$.hover(function () {
                $$.stop().animate({
                    opacity: 0
                }, 250);
                
//                heightToSet = $$.parent().children('.fade2').height() + 8;   
//                if(heightToSet) $$.parent().parent().parent().children('#box_realizacje_img_img').height(heightToSet);
                
                $$.parent().children('.fade2').stop().animate({
                    opacity: 1
                }, 250);
                
            }, function () {

//                heightToSet2 = $$.height() + 8;
//                if(heightToSet2)$$.parent().parent().parent().children('#box_realizacje_img_img').height(heightToSet2);
                
                
            	$$.stop().animate({
                    opacity: 1
                }, 250);
                
                $$.parent().children('.fade2').stop().animate({
                    opacity: 0
                }, 250);                
            });
        });
    };
    
})(jQuery);

// note that this uses the .bind('load') on the window object, rather than $(document).ready() 
// because .ready() fires before the images have loaded, but we need to fire *after* because
// our code relies on the dimensions of the images already in place.
$(window).bind('load', function () {
    $('img.fade').cross();
});