function GetXmlHttpObject(handler){var objXMLHttp=null;if(window.XMLHttpRequest){objXMLHttp=new XMLHttpRequest()}else{if(window.ActiveXObject){objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")}}return objXMLHttp}

function stateChanged(){if(xmlHttp.readyState==4||xmlHttp.readyState=="complete"){nothing=xmlHttp.responseText}else{}}

function ajaxUpdate(){url='../../system/control_session.php';xmlHttp=GetXmlHttpObject();if(xmlHttp==null){alert("Browser does not support HTTP Request. Try other browser.");return}url=url+"?sid="+Math.random();xmlHttp.onreadystatechange=stateChanged;xmlHttp.open("GET",url,true);xmlHttp.send(null)}