var _flag_is_open = false;
function slide_close(){
    new Effect.BlindUp($('contentbar'), {
        duration: '0.5'
    });
}
function slide_open(){
    new Effect.BlindDown($('contentbar'), {
        duration: '0.5',
        afterFinish: function(){
            new Effect.ScrollTo($('contentbar'), {
                queue: 'end'
            });
        }
    });    
}
function slide_in_out(){
    if (_flag_is_open) {
        slide_close();
        _flag_is_open = false;
    } else {
        slide_open();
        _flag_is_open = true;
    }
}
function slide_init(){
    new Effect.BlindUp($('contentbar'), {
        duration: '0.0'
    });
    $('bottombar').observe("click", slide_in_out);
}
document.observe("dom:loaded", function(){
    slide_init();
})