可参考链接
代码
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JS</title>
<script type="text/javascript" src="jquery.min.js"></script>
</head>
<style>body {
text-align: center;
}</style>
<body>
<div id="box">
<input type="number" name="number" id="number">
<button class="btn" onclick="doClick()">保留两位小数</button>
<button class="btn" onclick="doClick2()">转换为千分位格式</button>
</div>
<script type="text/javascript">function doClick(){
var numberValue = $("#number").val()
alert("numberValue = " + numberValue)
var resultValue = to2bits(numberValue)
resultValue = resultValue.toFixed(2);
alert("resultValue.toFixed 2 = " + resultValue)
}
function doClick2(){
var numberValue = $("#number").val()
var resultValue = numToMoneyField(numberValue)
alert("resultValue = " + resultValue)
}
function to2bits(flt) {
if (parseFloat(flt) == flt) {
return Math.round(flt * 100) / 100; // 到2位小数
}
else
return 0;
}
//转换为千分位格式
//将1234567.00转换为1,234,567.00
function numToMoneyField(inputString) {
regExpInfo = /(\d{1,3})(?=(\d{3})+(?:$|\.))/g;
var ret = inputString.toString().replace(regExpInfo, "$1,");
return ret;
}</script>
</body>
</html>
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