/**
 * Pobierz i ustaw inna strone kategorii (AJAX)
 */
function changePage(th){
    $.blockUI();
    var url = th.href
    if(url.indexOf('/ajax/true') == -1)
        url += '/ajax/true';
    $.ajax({
        url: url,
        cache: false,
        complete: $.unblockUI(),
        success: function(html){
            $("#category_items").fadeOut("slow", function() {
                $("#category_items").replaceWith($(html).contents("#category_items"));
            });
        }
    });
}

function slide(field){
    $(field).next().slideToggle("slow");
}

function linksExternal(){
    if (document.getElementsByTagName) {
        var anchors = document.getElementsByTagName("a");
        for (var i = 0; i < anchors.length; i++) {
            var anchor = anchors[i];
            if (anchor.getAttribute("rel") == "external") {
                anchor.target = "_blank";
            }
        }
    }
}

function isNumeric(sText) {
    var ValidChars = " 0123456789";
    var IsNumber=true;
    var Char;
    for (i = 0; i < sText.length && IsNumber == true; i++) {
        Char = sText.charAt(i);
        if (ValidChars.indexOf(Char) == -1) {
            IsNumber = false;
        }
    }
    return IsNumber;
}

function stat(){
    var res;
    win = window.screen;
    if (window.screen) 
        res = win.width + 'x' + win.height;
    var czas = new Date();
    czas.setTime(czas.getTime() + (365 * 24 * 60 * 60 * 1000));
    SetCookie("stat", res, czas, '/');
}