(function($){$.extend({add2cart:function(source_id,target_id,callback){var source=$('#'+source_id);var target=$('#'+target_id);var shadow=$('#'+source_id+'_shadow');if(!shadow.attr('id')){$('body').prepend('<div id="'+source.attr('id')+'_shadow" style="display: none; background-color: #eee; border: solid 1px #ddd; position: static; top: 0px; z-index: 100000;">&nbsp;</div>');var shadow=$('#'+source.attr('id')+'_shadow');}
if(!shadow){alert('Cannot create the shadow div');}
shadow.width(source.css('width')).height(source.css('height')).css('top',source.offset().top).css('left',source.offset().left).css('opacity',0.8).show();shadow.css('position','absolute');shadow.animate({width:target.innerWidth(),height:target.innerHeight(),top:target.offset().top,left:target.offset().left},{duration:1000}).animate({opacity:0},{duration:200,complete:callback});shadow.animate({"left":"-9999","opacity":0},{duration:20,complete:callback});}});})(jQuery);