function newXmlHttpRequest () {
	var request = false;
	if ( window.XMLHttpRequest ) {
		try {
			request = new XMLHttpRequest();
		} catch ( e ) {
			request = false;
		}
	} else if ( window.ActiveXObject ) {
		try {
			request = new ActiveXObject('Msxml2.XMLHTTP');
		} catch ( e ) {
			try {
				request = new ActiveXObject('Microsoft.XMLHTTP');
			} catch ( e ) {
				request = false;
			}
		}
	}
	return request;
}

function AjaxCall(callback,page,postFields) {
    req = new newXmlHttpRequest();
    req.onreadystatechange = eval(callback);
    req.open("POST", page, true);
    req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
      var reqStr="";
        for(var i=0;i<postFields.length;i++) {
            reqStr+=postFields[i].id+"="+postFields[i].value+"&";
        }
        reqStr=reqStr.substr(0,reqStr.length-1);
  //      alert(reqStr);
        req.send(reqStr);
}