JS使IE窗口闪烁或根据条件闪烁，使IE窗口获得焦点

 

        <script language=javascript>
            function refwindow(num)
            {
                var num=num;
                num++;
                var mytimeout = window.setTimeout("refwindow(4)",12000);
                if(num==5)
                {
//闪烁几下提示用户有信息
                    var cdemo = window.setTimeout("window.focus()",1000);
                }

            }
        </script>