function nuevoAjax(){
	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 formulario(habitacion){
	var pizarra;
	//var vuelo, pizarra, airlineCode, flightCode, fecha;
	pizarra = document.getElementById('pizarra-rooms');

	ajax=nuevoAjax();
	ajax.open("GET", "/ajax/rooms.php?habitacion="+habitacion,true);
	ajax.onreadystatechange=function() {
		if (ajax.readyState!=4) {
			pizarra.innerHTML = "<div id='alert'><img src='/img/loading.gif'/><br/>Cargando...</div>"
		}else{
			pizarra.innerHTML = ajax.responseText;
			//window.setTimeout('espera();',2000); 
	 	}
	}
	ajax.send(null)
}