js数字转换

js保留小数

<script type="text/javascript">
    $(function () {
        $("#one").change(function () {
            var numParse = NumParse($(this).val(), 2, "f");
            $(this).val(numParse);
        });


    });

    function NumParse(val, num, intOrFloat) {
        if (val == null && val == "" && val == undefined) {
            val = 0;
        }
        if (isNaN(val)) {
            val = 0;
        }
        if (isNaN(val)) {
            num = 2;
        }
        var number = 0;
        if (intOrFloat == "i") {
            number = parseInt(val).toFixed(num);
        } else {
            number = parseFloat(val).toFixed(num);
        }
        return number;
    }
</script>
value:<input type="text" id="one">