以下代码演示如何使用JS实现浮动框效果。不过太简单了，大家可不要砸鸡蛋哦～
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
    <style type="text/css">
        .Parent {
            position:absolute;
            height:150px; width:200px;
            top:0px; left:0px;
            border:1px solid #123456;
            BACKGROUND-COLOR: #bbbbbb
        }
        .Header {
            margin:2px;
              padding:2px;
              width:194px;
             color:white;
             background-color:navy;
             font-family:宋体;
              font-size:12px;
        }
        .Content {
            color:black;
            font-family:宋体;
            font-size:12px;
        }
    </style>  

    <script type="text/javascript">
        var dx = 0;
        var dy = 0;
        var x = 0;
        var y = 0;
        var isMouseDown = false;
        var idNumPre = -1;
        var root;
        
        function mouseMove(idNum) {
            if (isMouseDown) {
                if (idNumPre != idNum) {
                    root = document.getElementById("Parent" + idNum);
                    idNumPre = idNum;
                }
                root.style.top = event.clientY - dy + "px";    
                root.style.left = event.clientX - dx + "px";
                y = event.clientY - dy;
                x = event.clientX - dx;
            }
        }
        
        function mouseDown(idNum) {
            dx = event.clientX - x;
            dy = event.clientY - y;
            isMouseDown = true;
        }
        
        function mouseUp(idNum) {
            isMouseDown = false;
        }
    
        function mouseOut(idNum) {
            isMouseDown = false;
        }
    </script>

</head>
<body>
<div id = "Parent1" class='Parent'>
    <div id = "header1" class="Header" onmouseup="mouseUp('1');"
        onmousemove="mouseMove('1');" onmousedown="mouseDown('1');"
        onmouseOut="mouseOut('1');">浮动框示例
     </div>
    <div id = "content1" class="Content">release2006@163.com</div>
</div>
</body>
</html>