function ajax_Session_Submit(url,postStr) {
	var ajax=false; 
	try { ajax = new ActiveXObject("Msxml2.XMLHTTP"); }
	catch (e) { try { ajax = new ActiveXObject("Microsoft.XMLHTTP"); } catch (E) { ajax = false; } }
	if (!ajax && typeof XMLHttpRequest!='undefined') ajax = new XMLHttpRequest(); 

	ajax.open("POST", url, true); 
	ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 
	ajax.send(postStr);
	ajax.onreadystatechange = function(){} 
}