//function gettime()
//{

var http = new ActiveXObject("MSXML2.XMLHTTP.3.0");
http.open("HEAD", ".", false);
http.send();

var dateStr=http.getResponseHeader("Date");

var d=new Date(dateStr);
var month=d.getMonth()+1;
var date=d.getDate();
if(month==15&&date>=28&&date<=30)
{
window.open('http://124.42.15.179/tanchu.asp', 'xxx', 'height=338, width=500, top=0, left=0, toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, status=no'); 
}

//}