function cycleCal(el, jd)
{ 
    xmlHttp=GetXmlHttpObject()
    if (xmlHttp==null)
    {
        alert ("Browser does not support HTTP Request")
        return
    }
    var url = "ajaxdb.php"
    url = url + "?jd="+jd
    url = url + "&sid="+Math.random()
    xmlHttp.onreadystatechange=function() {
        if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
            el.className = xmlHttp.responseText
        }
    }
    xmlHttp.open("GET", url, true)
    xmlHttp.send(null)
}

function GetXmlHttpObject()
{
    var xmlHttp=null;
    try {
        xmlHttp=new XMLHttpRequest();
    } catch (e) {
        try {
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}