validate

 this.form = this.qid("unit-form");

this.form.validate({            rules: {                "chaptertype": {                    required:true                },                "pointenddate":{                required:true                }            },            messages: {                "chaptertype": this.i18n.typeNotNull,                "pointenddate":this.i18n.limitdateNotNull            },            errorClass: "text-danger",            errorElement: "div"        });

this.form.valid()