function nav_move(delta, obj)
{  
   vnav[obj]['page'] = parseInt(vnav[obj]['page']) + delta;      
   var params = new Object();   
   for (key in vnav[obj]) {
      params[key] = vnav[obj][key];
   }      
   $.post('ajax.php?m='+obj, params, nav_ajaxcallback, "json");
}

function nav_ajaxcallback(data, textStatus) {
    if (textStatus=="success") {
        $('#'+data.div).html(data.html);
    }
}

 
 /*
function set_ajaxloading(elname, active) {
    if (!$defined(active)) active = true;
    
    var el = $(elname);
    if (!$defined(el)) return false;
    var ajname = elname + '-ajaxloding';
    var ajel = $(ajname);
    if (active) {
        el.addClass('ajax-loading-container');
        if (!$defined(ajel)) {
            ajel = new Element('div', {
                'class': 'ajax-loading',
                'id': ajname,
                'display': 'none'
            });
        }
        var zindex = el.getStyle('z-index');
        if (!$defined(zindex) || !zindex || isNaN(zindex)) zindex = 10;
        else zindex++;
        var coords = $(el).getCoordinates();
        ajel.setStyles({
            'z-index': zindex,
            'width': coords.width,
            'height': coords.height,
            'left': coords.left,
            'top': coords.top,
            'position': 'absolute'
        });
        ajel.injectAfter(el);
        ajel.setStyle('display', '');
    } else {
        if ($defined(ajel)) {
            ajel.empty();
            ajel.remove();
            //ajel.setStyle('display', 'none');
        }
        el.removeClass('ajax-loading-container');
    }
}*/