// Documento JavaScript
// Esta función cargará las paginas
function cc(url, id_contents){
    var pagina_requerida = false;
    if (window.XMLHttpRequest){
       pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
      try 
       {
            pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP");
       }
        catch (e){
           try
         {
               pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP");
          }
          catch (e)
           {
           }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function ()
    {
        cargarpagina (pagina_requerida, id_contents);
    }
    pagina_requerida.open ('GET', url, true); // asignamos los métodos open y send
    pagina_requerida.send (null);
}

function cargarpagina (pagina_requerida, id_contents)
{
    if (pagina_requerida.readyState == 4 && (pagina_requerida.status == 200 || window.location.href.indexOf ("http") == - 1))
    document.getElementById (id_contents).innerHTML = pagina_requerida.responseText;
}