function openWin() { 
           var url='Add.aspx';                             //轉向網頁的地址; 
           var name='add';                            //網頁名稱，可為空; 
           var iWidth=720;                          //彈出視窗的寬度; 
           var iHeight=600;                         //彈出視窗的高度; 
           //獲得視窗的垂直位置 
           var iTop = (window.screen.availHeight - 30 - iHeight) / 2; 
           //獲得視窗的水平位置 
           var iLeft = (window.screen.availWidth - 10 - iWidth) / 2; 
           window.open(url, name, 'height=' + iHeight + ',,innerHeight=' + iHeight + ',width=' + iWidth + ',innerWidth=' + iWidth + ',top=' + iTop + ',left=' + iLeft + ',status=no,toolbar=no,menubar=no,location=no,resizable=no,scrollbars=0,titlebar=no'); 
          // window.open("http://p.qiao.baidu.com/cps/chat?siteId=10377321&userId=19759389", "newWindows", 'height=100,width=400,top=0,left=0,toolbar=no,menubar=no,scrollbars=no, resizable=no,location=no, status=no'); 
       }