js 正則表達式，正整數

            var ss= "3.333";
            var type = /^[0-9]*[1-9][0-9]*$/;
            var re = new RegExp(type);
            alert(ss.match(re));
            if (ss.match(re) == null) {
                alert("請輸入大於零的整數!");
                return;
            }