js数字转换

<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">