// JavaScript Document
// Copyright http://jqueryfordesigners.com/
// 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 $$ = $(this);
			// get the target from the backgroundImage + regexp
			var target = $$.css('backgroundImage').replace(/^url|[\(\)'"]/g, '');
			// nice long chain: wrap img element in span
			$$.wrap('<span style="position:relative;"></span>')
			// change selector to parent - i.e. newly created span
			.parent()
			// prepend a new image inside the span
			.prepend('<img>')
			// change the selector to the newly created image
			.find(':first-child')
			// set the image to the target
			.attr('src', target);
			// the CSS styling of the start image needs to be handled
			// differently for different browsers
			if ($.browser.msie || $.browser.mozilla) {
				$$.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
                    }, 250);
                }, function () {
                    $$.stop().animate({
                        opacity: 1
                    }, 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();
	});