$(document).ready(function(){
    // All our interactivity will be coded in here
    $(".rollover").hover(
        function(){
            // The user has rolled over the element
            $(this).append("<div id='temp'></div>");
            bgimg = $(this).css("backgroundImage");
            $(this).find("#temp").css({position:"absolute",width:"100%",height:"100%",top:0,left:0,background:"transparent "+bgimg+" no-repeat bottom left",opacity:0});
            $(this).find("#temp").stop().animate({opacity:1},1000);

        },
        function(){
            // The user has rolled out of the element
            $(this).find("#temp").stop().animate({opacity:0},1000,function(){$(this).remove()});
        }
    );


});


(function ($) {
    $.fn.cross = function () {
        return this.each(function (i) {
            // cache the copy of jQuery(this) - the start image
            var $$ = $(this);

            // get the target from the backgroundImage + regexp
            var target = $$.css('backgroundImage').replace(/^url|[\(\)'"]/g, '');
            $$.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>')
            // 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 || $.browser.mozilla) {
                $$.css({
                    'position' : 'absolute',
                    'left' : 0,
                    'background' : '',
                    'top' : this.offsetTop
                });
            } else if ($.browser.opera && $.browser.version < 9.5) {
                // Browser sniffing is bad - however opera < 9.5 has a render bug
                // so this is required to get around it we can't apply the 'top' : 0
                // separately because Mozilla strips the style set originally somehow...
                $$.css({
                    'position' : 'absolute',
                    'left' : 0,
                    'background' : '',
                    'top' : "0"
                });
            } else { // Safari
                $$.css({
                    'position' : 'absolute',
                    'left' : 0,
                    'background' : ''
                });
            }

            // 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
                }, "fast");
            }, function () {
                $$.stop().animate({
                    opacity: 1
                }, "fast");
            });
        });
    };

})(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();
});