function objetus(file) {
    http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
	  alert('4');
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try { 
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Error cargando encuesta.');
         return false;
      }
	return http_request;
}

function recibeid(pag,valorpost,capa){ 
    var ajax = objetus(pag);
	ajax.open("POST", pag+"?"+valorpost+"&tiempo="+new Date().getTime(),true);
    ajax.onreadystatechange=function() {
        if (ajax.readyState==1){
			document.getElementById(capa).style.textAlign = 'center';
            document.getElementById(capa).innerHTML = 
				"<img src='/images/cargando.gif' align='center'>";
        }
        if (ajax.readyState==4) {
            if(ajax.status==200)
            {document.getElementById(capa).innerHTML = ajax.responseText;}
            else if(ajax.status==404)
            {
                capa.innerHTML = "La direccion no existe";
            }
            else
            {
                capa.innerHTML = "Error: ".ajax.status;
            }
        }
    }
    if(valorpost!=""){
        ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        ajax.send(valorpost);
    } else {
        ajax.send(null);
    }
}