function newXmlHttp(){
	var ajaxM = false;
	try {
		ajaxM = new ActiveXObject("Msxml2.XMLHTTP");
	}catch(e){
		try { ajaxM = new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) { ajaxM = false;}
	}
	if(!ajaxM && document.createElement){
		ajaxM = new XMLHttpRequest();
	}
	return ajaxM;
}
function ajax(ap,aid,at){
	var url = ap+".php?"+aid;
	ajaxM = newXmlHttp();
	ajaxM.open("GET", url, false);
	ajaxM.send(null); 
	document.getElementById(at).innerHTML = ajaxM.responseText;
}
//รับค่ามา post
function ajaxPos(ap,que,at){
	var url = ap+".php";
	ajaxMPo = newXmlHttp();
	var poststr = que;
	ajaxMPo.open("POST", url, true);
	ajaxMPo.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	ajaxMPo.setRequestHeader("Content-length", poststr.length);
	ajaxMPo.setRequestHeader("Connection", "close");
	ajaxMPo.send(poststr); 
	ajaxMPo.onreadystatechange = function() {
		if (ajaxMPo.readyState==4) {
			if (ajaxMPo.status == 200) {
				document.getElementById(at).innerHTML = ajaxMPo.responseText; 
			}
		}
	};
}