$(function () {
    var query = window.location.search;
    var categoryID = query.substring(query.indexOf("=") + 1, query.indexOf("&"));
    var topMenu = $("#menu a");
    if (categoryID) {
        var topCategory = categoryID.substring(0, 3);
        for (var i = 0; i < topMenu.length; i++) {
            if ($(topMenu[i]).attr("href").indexOf(topCategory.toString()) != -1) {
                $(topMenu[i]).addClass("on");
                if (categoryID.length > 3) {
                    var subMenu = $("#subcategories a");
                    for (var i = 0; i < subMenu.length; i++) {
                        if ($(subMenu[i]).attr("href").indexOf(categoryID.toString()) != -1) {
                            $(subMenu[i]).addClass("on");
                        }
                    }
                }
                return;
            }
        }
    }
    else {
        var url = window.location;
        for (var i = 0; i < topMenu.length; i++) {
            if (url.toString().indexOf($(topMenu[i]).attr("href")) != -1) {
                $(topMenu[i]).addClass("on");
                return;
            }
        }
    }
    $(topMenu[0]).addClass("on");
})