$(document).ready(function(){
    $("#tree_beginner").treeview({
        animated: "fast",
        collapsed: true
    });
    $("#tree_elementary").treeview({
        animated: "fast",
        collapsed: true
    });
    $("#tree_intermediate").treeview({
        animated: "fast",
        collapsed: true
    });
    $("#tree_upper_intermediate").treeview({
        animated: "fast",
        collapsed: true
    });
    var osize = $("a.open_link").size();

    if(osize>0) {
        $("a.open_link").css('color','#000');
        $("a.afree").css('color','#8A8A8A');
        $("a.open_link").parents("li.expandable")
        .removeClass("expandable")
        .addClass("collapsable")
        .addClass("open")
        .find(">.hitarea")
        .addClass('collapsable-hitarea')
        .removeClass('expandable-hitarea')
        .end()
        .find( ">ul" )
        .css('display','block');
    } else {
        $(".toggle_switcher:first").parent().siblings().find(".toggle").slideUp("normal");
        $(".toggle_switcher:first").next().slideToggle("normal");
    }
});