Jquery hiden() 与 .css('visibility','visible') 区别

$('ul.load_details').css({visibility,"visible"}).

$('ul.load_details').css({visibility,"hidden"}).

像上面的这种是世界存在的，也占用了空间位置，如果是超链接hidden后，你还可以进行链接。说白了  就是透明而已，function和object仍然存在

$('ul.load_details').show();
$('ul.load_details').hide();

hide()和show()方法，这个是真正的把function和object都去掉了

$('ul.load_details').animate({opacity:"show"});

 $('ul.load_details').animate({opacity:"hide"});

Or do you want to really fade-in the element like this:

$('ul.load_details').animate({opacity:1});
$('ul.load_details').animate({opacity:0});