function   tanchu()
{
//公告弹出页面 
window.open ('tanchu.aspx','newwindow', 'height=230, width=350, top=0, left=0, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=n o, status=no');
//新年喜庆弹出页面
//window.open ('xiqing.aspx','newwindow', 'height=360, width=300, top=0, left=0, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=n o, status=no');

}