var $target = $container.children().last();$target.find('.dot, .triangle, .textcon').each(function (i, n) {    var $this = $(n);    switch(n.className) {        case 'dot':            $this.addClass('error-dot');            break;        case 'triangle':            $this.addClass('error-triangle');            break;        case 'textcon':            $this.addClass('error-textcon');            break;    }});