function LeftMenu() {
    var lm = $('.menu_left'),
        as = null,
        i = 0;
    
    if (lm.length == 0) {
        return;
    }
    
    lm.find('.roll').not('.u0').addClass('dont_display');
    
    as = lm.find('a.active');
    for (i = 0; i < as.length; i++) {
        if ((i == 0) && (as.length == 1)) {
            $(as[i]).removeClass('active');
        } else {
            $(as[i]).closest('.roll').removeClass('dont_display');
        }
    }
    
    lm.click(function(_event){
        var target = $(_event.target),
            a = target.closest('a');
        
        if (a.length > 0) {
            if (a.parent().is('li.l0')) {
                _event.preventDefault();
                //a.next().toggleClass('dont_display');
                a.next().slideToggle('fast');
            }
        }
    });
}

$(document).ready(function(){
    LeftMenu();
});