function getNowTime(){
    var d, s ;
    d = new Date();
    s = d.getFullYear();
    s += "-" +d.getDate();
    s += "-"+d.getHours();
    s += "-"+d.getMinutes();
    s += "-"+d.getSeconds();
    s += "-"+d.getMilliseconds();
    return s;
}

function getServerTime(){ 
    var objXMLHTTP=new ActiveXObject("MICROSOFT.XMLHTTP"); 
    objXMLHTTP.open("GET","/ServerTime.aspx?nowTime="+getNowTime(),false); 
    objXMLHTTP.send(""); 
    var strReturn=objXMLHTTP.ResponseText; 
    document.getElementById("hf_ServerTime").value= strReturn;  
}