function cambiarPagina(url){
             var contenido = document.getElementById("content");
            // var panel_contenido = document.getElementById("contenido_interno");
             var ajax = new Freelancesoft.Ajax();
             var loader_div = document.getElementById("ajax_loader");
             var params = url.split('/');

             loader_div.style.display="block";

             ajax.request.onreadystatechange=function(){
               if (ajax.request.readyState==4) {

                  contenido.innerHTML= ajax.request.responseText;
                  loader_div.style.display="none";
               }
             }

             ajax.sendRequest('AjaxServer.php?categoria='+params[0]+'&pagina='+params[1]);

   }

   function modificarLinks(){
              var menu = document.getElementById("nav_bar");
              var menu_top = document.getElementById("footer_text");
              var link_cms = "^(.)*/content/(.)*$";

              var links_menu = menu.getElementsByTagName("a");

              for(i=0; i<links_menu.length; i++){

                   if(links_menu[i].href.match(link_cms)){
                       var req = links_menu[i].href.split(".ar/");

                       links_menu[i].href="javascript:cambiarPagina('"+req[1].substring(8,req[1].length)+"');";
                   }
              }

              var links_menu_top = menu_top.getElementsByTagName("a");
              for(i=0; i<links_menu_top.length; i++){

                   if(links_menu_top[i].href.match(link_cms)){
                       var req = links_menu_top[i].href.split(".ar/");

                       links_menu_top[i].href="javascript:cambiarPagina('"+req[1].substring(8,req[1].length)+"');";
                   }
              }
   }