function getInsertBtn(){              //创建input元素        var inp = document.createElement("input");        inp.type = "button";        inp.addEventListener('click', function () {            openLayerUrl('@Url.Action("PartialChildNodeView", "UEditor")');getBtnValue(this.value);printBtnValue()        })        let addButtonLength = Number($('.addButton>input').length)+1;        inp.value = "知识点" + addButtonLength;        $(".addButton").append($(inp))             }