javascript 弹出窗口

    <script language="javascript">
        function ShowDialog(url) {
            var iWidth = 500; //窗口宽度 
            var iHeight = 580; //窗口高度 
            var iTop = (window.screen.height - iHeight) / 2;
            var iLeft = (window.screen.width - iWidth) / 2;
            window.showModalDialog(url, window, "dialogHeight: " + iHeight + "px; dialogWidth: " + iWidth + "px;dialogTop: " + iTop + "; dialogLeft: " + iLeft + "; resizable: no; status:no;scroll:no");
        } 
    </script>