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 objetoAjax()
{ 
	var req;
	req = false;
    if(window.XMLHttpRequest) {
    	try {
			req = new XMLHttpRequest();
        } catch(e) {
			req = false;
        }
    } else if(window.ActiveXObject) {
       	try {
        	req = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		req = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		req = false;
        	}
		}
    }
	return req;
}

function PaginaVirtual(nropagina2,idpag2){
	divContenido = document.getElementById('virtual');
	ajax=objetoAjax();
	ajax.open("GET", "envia_clasificados.php?pag2="+nropagina2+"&idpag2="+idpag2); 
	divContenido.innerHTML= "<br /><img src='imagenes/cargando.gif'> <span class='txt_112'><br />&nbsp;&nbsp;Cargando...</span>";
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {	
			divContenido.innerHTML = ajax.responseText
		}
	}	
	ajax.send(null)
}