// 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, '');
			
			if(!$$.hasClass('noRel')){
				var style = 'style="position: relative;"';
			}else{
				var style = '';
			}
			
			if($$.hasClass('fix')){
				style += ' class="big_image"' ;
			}
			
            // nice long chain: wrap img element in span
            $$.wrap('<div '+style+' ></div>')
                // 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($$.hasClass('fix')){
				$$.css({
                    'position' : 'absolute', 
                    'left' :  60 +$$.width(),
                    'background' : '',
                    'top' : this.offsetTop
                });
			}else if ($.browser.msie || $.browser.mozilla) {
	                $$.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);

$(window).bind('load', function () {
    $('img.crossfade').cross();
});