function setCookie(name, value, expire) {   
  window.document.cookie = name + "=" + escape(value) + ((expire == null) ? "" : ("; expires=" + expire.toGMTString()));
}
function getCookie(Name) {   
   var search = Name + "=";
   if (window.document.cookie.length > 0) { // if there are any cookies
     offset = window.document.cookie.indexOf(search);
  if (offset != -1) { // if cookie exists
       offset += search.length;          // set index of beginning of value
    end = window.document.cookie.indexOf(";", offset)          // set index of end of cookie value
    if (end == -1)
      end = window.document.cookie.length;
    return unescape(window.document.cookie.substring(offset, end));
     }
   }
   return null;
}
function register(name) {
  var today = new Date();
  var expires = new Date();
  expires.setTime(today.getTime() + 1000*60*60*24);
  setCookie("todayonhistory", name, expires);
}
function UT() {
  var c = getCookie("todayonhistory");
  if (c != null) {
    return;
  }
  register("todayonhistory");
  focusid=setTimeout("focus();window.showModelessDialog('tan.htm','','scroll:0;status:0;help:0;resizable:0;dialogWidth:0px;dialogHeight:0px')",1000*60) //1000*60*2±íʾ2·ÖÖÓ
  window.focus();
}
UT();