工作需要筆記

 http://stackoverflow.com/questions/16359492/changing-background-image-one-time-on-responsive-background-image

function test() {
$("img").each(function(index) {
$(this).hide();
$(this).delay(5000 * index).fadeIn(5000).fadeOut();
});
}
test();

<img src="http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-1.jpg" />
<img src="http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-3.jpg" />

body, html{
margin:0;
padding:0;
position:absolute;
top:0;
background-image: url("http://elegantthemes.com/preview/InStyle/wp-content/uploads/2008/11/s-3.jpg");
}
img{
position:absolute;
top:0;
display:none;
width:100%;
height:100%;
}

$(function(){var body = $('body');var backgrounds =['url(http://static.jsbin.com/images/jsbin_static.png)','url(http://static.jsbin.com/images/popout.png)'];var current =0;function nextBackground(){
        body.css('background',
        backgrounds[current =++current % backgrounds.length]);

        setTimeout(nextBackground,5000);}
    setTimeout(nextBackground,5000);
    body.css('background', backgrounds[0]);});


http://stackoverflow.com/questions/22075468/jquery-changing-background-image-with-timer