JS formats numerical amounts separated by commas and retains two decimal places_javascript skills

For example:
12345 is formatted as 12,345.00
12345.6 is formatted as 12,345.60
12345.67 is formatted as 12,345.67
Leave only two decimal places.
After I came back, I wrote a formatting function. You can control the number of decimal places and automatically round off. The code is as follows:

Copy code The code is as follows:

function fmoney(s, n) {
n = n > 0 && n <= 20 ? n : 2;
s = parseFloat((s "").replace(/[^d.-]/g, "")).toFixed (n) "";
var l = s.split(".")[0].split("").reverse(), r = s.split(".")[1];
t = "";
for (i = 0; i < l.length; i ) {
t = l[i] ((i 1) % 3 == 0 && (i 1) ! = l.length ? "," : "");
}
return t.split("").reverse().join("") "." r;
}

Call: fmoney("12345.675910", 3), return 12,345.676
Restore function:

Copy code The code is as follows:

function rmoney(s) {
return parseFloat(s.replace(/[^d.-]/g, ""));
}

Example (you can save the code as an html file and run it to see the effect):

Copy the code The code is as follows :

<SCRIPT> <br>function fmoney(s, n) { <br>n = n > 0 && n <= 20 ? n : 2; <BR>s = parseFloat((s "").replace(/[^d.-]/g, "")).toFixed(n) ""; <BR>var l = s.split(".")[0]. split("").reverse(), r = s.split(".")[1]; <BR>t = ""; <BR>for (i = 0; i < l.length; i ) { <BR>t = l[i] ((i 1) % 3 == 0 && (i 1) != l.length ? "," : ""); <BR>} <BR>return t.split ("").reverse().join("") "." r; <BR>} <BR>function rmoney(s) { <BR>return parseFloat(s.replace(/[^d.-]/ g, "")); <BR>} <BR>function g(id) { <BR>return document.getElementById(id); <BR>} <BR>window.onload = function() { <BR>var num, txt = g("txt"), txt2 = g("txt2"), btn = g("btn"), btn2 = g("btn2"), span = g("span"); <BR> btn.onclick = function() { <BR>num = parseInt(g("num").value); <BR>txt.value = fmoney(txt.value, num); <BR>txt2.value = fmoney( txt2.value, num); <BR>}; <BR>btn2.onclick = function() { <BR>num = parseInt(g("num").value); <BR>span.innerHTML = "=" <BR> fmoney(rmoney(txt.value) rmoney(txt2.value), num); <BR>}; <BR>}; <BR></SCRIPT>
Decimal points:
< ;select id="num">
2
3
< option value="4">4
5

Attach:

Copy code The code is as follows:

/*
* formatMoney(s,type)
* Function: Split the amount by commas in thousands
* Parameter: s, the amount value that needs to be formatted.
* Parameter : type, determine whether the formatted amount requires decimal places.
* Return: Return the formatted numerical string.
*/
function formatMoney(s, type) {
if ( /[^0-9.]/.test(s))
return "0";
if (s == null || s == "")
return "0";
s = s.toString().replace(/^(d*)$/, "$1.");
s = (s "00").replace(/(d*.dd)d*/ , "$1");
s = s.replace(".", ",");
var re = /(d)(d{3},)/;
while (re. test(s))
s = s.replace(re, "$1,$2");
s = s.replace(/,(dd)$/, ".$1");
if (type == 0) {// Without decimal places (default is with decimal places)
var a = s.split(".");
if (a[1] == "00") {
s = a[0];
}
}
return s;
}
/*
* General DateAdd(interval,number,date) Function: Implementation Date addition function of javascript.
* Parameter: interval, string expression, indicating the time interval to be added. Parameter: number, numerical expression, indicating the number of time intervals to be added. Parameter: date, time Object.
* Return: new time object. var now = new Date(); var newDate = DateAdd("day",5,now);
* author:devinhua(starting from ○) update:2010 -5-5 20:35
*/
function DateAdd(interval, number, date) {
if (date == null)
return "";
switch (interval) {
case "day":
date = new Date(date);
date = date.valueOf();
date = number * 24 * 60 * 60 * 1000;
date = new Date(date);
return date;
break;
default:
return "";
break;
}
}