$(function(){
$("body,html").backstretch("images/ctn_04.jpg");
});
$(function(){
$("#box").backstretch("images/ctn_01.jpg");
});
$(function(){
$("#box2").backstretch([
"images/ctn_01.jpg",
"images/ctn_02.jpg",
"images/ctn_03.jpg",
"images/ctn_04.jpg"
], {duration: 3000, fade: 750});
});