javascript弹出一个页面的函数

<head runat="server">
    <title>无标题页</title>
    <script type="text/javascript">
        function openwin() { window.open ("NewsEdit.aspx?istrue=0&nid=0", "newwindow", "height=400, width=400, toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, status=no") }
    </script>
</head>

使用时：<input id="Button1" type="button" value="添加记录" onclick="openwin()"/>