jquery prevent cache(2015.06.17) 1

<!doctype html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="./js/jquery-1.11.3.min.js"></script>
<script>$.ajaxSetup({ cache: false });</script>
</head>
<body>
<button class="open" data-url="1.php">불러오기1</button>
<button class="open" data-url="2.html">불러오기2</button>
<button class="open" data-url="3.html">불러오기3</button>
<button class="open" data-url="4.html">불러오기4</button>
<div id="content"></div>
<script>
    $(function(){
        $(".open").click(function(){
            var url = $( this ).attr( "data-url" );
            if( ! url ) return;
            url = url + "?" + (new Date()).getTime();
            $( "#content" ).load( url );
        });
    });
</script>
</body>
</html>