code: function(e, index, liElem, options){
        options = options || {};
        var othis = liElem || $(this)
        ,index = index || othis.parent().children('li').index(othis)
        ,parents = options.headerElem ? othis.parent() : othis.parents('.layui-tab').eq(0)
        ,item = options.bodyElem ? $(options.bodyElem) : parents.children('.layui-tab-content').children('.layui-tab-item')
        ,elemA = othis.find('a')
        ,filter = parents.attr('lay-filter');
        
        if(!(elemA.attr('href') !== 'javascript:;' && elemA.attr('target') === '_blank')){
          othis.addClass(THIS).siblings().removeClass(THIS);
          item.eq(index).addClass(SHOW).siblings().removeClass(SHOW);
        }
        
        layui.event.call(this, MOD_NAME, 'tab('+ filter +')', {
          elem: parents
          ,index: index
        });
      }
docs: Tab点击