function xmlhttpPost(strURL,sid) {
    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	setLoading(sid);
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            updatepage(self.xmlHttpReq.responseText,sid);
        }
    }
    self.xmlHttpReq.send(getquerystring());
}


function getquerystring() {
   var qstr = "";
   // NOTE: no '?' before querystring
	if (document.forms.length != 0){
			for (i=0;i<=document.forms.length -1; i++){
				var form = document.forms[i];
				for (j=0; j < form.elements.length; j++){
					if (qstr == ''){
						qstr = form.elements[j].name + "=" + escape(form.elements[j].value);
					}else{
						qstr = qstr + "&" + form.elements[j].name + "=" + escape(form.elements[j].value);
					}
				}
			}
	}
    return qstr;
}

function updatepage(str,sid){
    document.getElementById(sid).innerHTML = str;
}
function setLoading(sid){
	document.getElementById(sid).innerHTML = "Loading...";
}