Format Currency with comma and decimal

Question

Hello everyone, I need your assistance. I need to format a numeric value to contain comma and decimal. I found this jquery (below) but it does not have a decimal. Can someone help me with how to add a decimal place? thank you.

 

function FormatCurrency(ctrl) {
    //Check if arrow keys are pressed - we want to allow navigation around textbox using arrow keys
    if (event.keyCode == 37 || event.keyCode == 38 || event.keyCode == 39 || event.keyCode == 40) {
        return;
    }

    var val = ctrl.value;

    val = val.replace(/,/g, "")
    ctrl.value = "";
    val += '';
    x = val.split('.');
    x1 = x[0];
    x2 = x.length > 1 ? '.' + x[1] : '';

    var rgx = /(\d+)(\d{3})/;

    while (rgx.test(x1)) {
        x1 = x1.replace(rgx, '$1' + ',' + '$2');
    }

    ctrl.value = x1 + x2;
}

function CheckNumeric() {
    return event.keyCode >= 48 && event.keyCode <= 57;
}