JS tab切换事件

$(‘ul.main-tab>li‘).on(‘mousedown‘, data, function() {
    var $this = $(this), $box = $(‘.main-tab-content‘), i = $this.index();
    if ($this.hasClass(‘on‘)) { return false; }
    switch (i) {
        case 1:
            window.radarUpdater = self.setInterval(function(){updateRadarTab(data)}, 3000);
            break;
        case 2:
            clearInterval(window.radarUpdater);
            updateoptional();
            break;
        case 3:
            clearInterval(window.radarUpdater);
            updateNoticeTab();
            break;
        default:
            break;
    }
    $this.siblings().removeClass(‘on‘);
    $this.addClass(‘on‘);
    $box.removeClass(‘block‘).css(‘display‘, ‘none‘);
    $box.eq(i).addClass(‘block‘).css(‘display‘, ‘block‘);
});