Javascript format the numeric amount separated by commas to keep two decimal places

For example:
12345 format to 12,345.00
12345.6 format to 12,345.60
12345.67 format to 12,345.67
Leave only two decimal places.
After returning, I wrote a Formatting Function. The number of decimal places can be controlled and automatically rounded. The Code is as follows:
Copy codeThe 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 codeThe 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 view the effect ):
Copy codeThe Code is as follows:
<SCRIPT>
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;
}
Function rmoney (s ){
Return parseFloat (s. replace (/[^ \ d \.-]/g ,""));
}
Function g (id ){
Return document. getElementById (id );
}
Window. onload = function (){
Var num, txt = g ("txt"), txt2 = g ("txt2"), btn = g ("btn"), btn2 = g ("btn2 "), span = g ("span ");
Btn. onclick = function (){
Num = parseInt (g ("num"). value );
Txt. value = fmoney (txt. value, num );
Txt2.value = fmoney (txt2.value, num );
};
Btn2.onclick = function (){
Num = parseInt (g ("num"). value );
Span. innerHTML = "="
+ Fmoney (rmoney (txt. value) + rmoney (txt2.value), num );
};
};
</SCRIPT>
Number of decimal places:
<Select id = "num">
<Option value = "2"> 2 </option>
<Option value = "3"> 3 </option>
<Option value = "4"> 4 </option>
<Option value = "5"> 5 </option>
</Select>
<Input type = "text" id = "txt" value = "12345.675910"> +
<Input type = "text" id = "txt2" value = "1223"> <span id = "span"> </span>
<Br>
<Input type = "button" id = "btn" value = "format">
<Input type = "button" id = "btn2" value = "add">

Appendix:
Copy codeThe Code is as follows:
/*
* FormatMoney (s, type)
* Function: the amount is separated by commas (,).
* Parameter: s. The value of the amount to be formatted.
* Parameter: type, used to determine whether the formatted amount requires decimal places.
* Return: returns the formatted numeric 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 * \. \ d) \ d */, "$1 ");
S = s. replace (".",",");
Var re =/(\ d) (\ d {3 },)/;
While (re. test (s ))
S = s. replace (re, "$1, $2 ");
S = s. replace (/, (\ d) $/, ". $1 ");
If (type = 0) {// no decimal places (decimal places by default)
Var a = s. split (".");
If (a [1] = "00 "){
S = a [0];
}
}
Return s;
}
/*
* Universal DateAdd (interval, number, date) function: implements the date addition function of javascript.
* Parameter: interval, string expression, indicating the time interval to be added. Parameter: number, numeric 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 (from ○) update:
*/
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;
}
}