function loadPage(page) {
    switch(page) {
        case 'about-us' :
            blockContent();
            $("#MENU-REALIZATIONS").css("visibility", "hidden");
            $.get("/service-ajax", {}, function(data){
                $("#CONTENT").html(data);
                unblockContent();
            });
            break;

        case 'contact' :
            blockContent();
            $("#MENU-REALIZATIONS").css("visibility", "hidden");
            $.get("/contact-ajax", {}, function(data){
                $("#CONTENT").html(data);
                unblockContent();
            });
            break;

        case 'projects' :
            loadProjects(0);
            break;

        case 'works' :
            loadProjects(1);
            break;
    }
}

function loadProjects(cat) {
    $.post("/projects-ajax", {category: cat}, function(data){
        blockContent()
        $.post("/realization-ajax", {page: 1, category: cat}, function(data){
                $("#CONTENT").html(data);
                unblockContent();
            });
       $("#MENU-REALIZATIONS").html(data);
       $("#MENU-REALIZATIONS").css("visibility", "");
       $("#MENU-REALIZATIONS").unblock();
    });
}

function loadRealization(p, c) {
    blockContent();
    $.post("/realization-ajax", {page: p, category: c}, function(data){
                $("#CONTENT").html(data);
                unblockContent();
            });
}

function blockContent() {
    $("#CONTENT").block({message: '<img src="/img/ajax-loader.gif" />',
        css: {border: "", backgroundColor: ""}});
}

function unblockContent() {
    $("#CONTENT").unblock();
}