打开一个新发窗口
<body>
    <input id="openBtn" type="button" value="打开窗口">
    <script>
        var openBtn = document.getElementById("openBtn");
        openBtn.onclick=function(){
            //打开新窗口
            open("http://www.baidu.com");
        }
    </script>
</body>
 
代开关闭一个新窗口
<body>
    <input id="openBtn" type="button" value="打开窗口">
    <input id="closeBtn" type="button" value="关闭窗口">
    <script>
        var openBtn = document.getElementById("openBtn");
        var newWindow;
        openBtn.onclick = function () {
            //打开新窗口
            newWindow = open("http://www.baidu.com");
        }
        var closeBtn = document.getElementById("closeBtn");
        closeBtn.onclick = function () {
            //关闭新窗口
            newWindow.close();
        }
    </script>
</body>










