function objAjax(){
	var xmlhttp=false;
	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (E) {
			xmlhttp = false;
			}
		}
		if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
		xmlhttp = new XMLHttpRequest();
		}

	return xmlhttp;
	} 

function postAjaxNoCache(url, param, func) {
	if (!param) param="";

	if ( param!="" ) param+="&";
	param+="nocache="+(new Date).getTime();
	
	postAjax(url, param, func);
	}
	
function postAjax(url, param, func) {	
	if (!param) param="";

	var ajax=objAjax();

	if (!func) func=function( ajax ) { if (ajax.readyState==4) eval(ajax.responseText); };

	var func2=function() { func( ajax ); };

	ajax.open("POST", url);
      	ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      	ajax.setRequestHeader("Content-length", param.length);
      	ajax.setRequestHeader("Connection", "close");

	ajax.onreadystatechange=func2;

      	ajax.send(param);	
	}