Question

How can when that typed numbers in input:text, separated them three to three and between them puting this:”,”?
normal number formatting

Example: typed this number in input: 45656839
result (live – online) in same input: 45,656,839
i not want use of plugin.

With respect

Answer 1

Demo

This should do it for you.

<input type="text" class="numeric" />

$("input:text.numeric").keyup(function(){
    $val = $(this).val();
    $(this).val($val.match(/[0-9]{1,3}/g).join(","))
});

EDIT

For normal number formatting, the code is a little different. There’s probably a some good regex out there for this but my first thought was to reverse the string and apply the same technique. Then you reverse the string again and you have it

$("input:text.numeric").keyup(function(){
    $val = $(this).val().match(/[0-9]/g).reverse().join("").match(/[0-9]{1,3}/g).join(",").match(/./g).reverse().join("");
    $(this).val($val)
});

EDIT 2

Demo

And for future reference if anyone wants to implement this with decimal places (yeah I got carried away :P) …

$("input:text.numeric").keyup(function(e){
    if(e.which > 40 || e.which == 8) {
        var num = $(this).val().match(/[0-9,]*/g)[0];
        var decimalNum = $(this).val().match(/[.][0-9]*/) || "";
        if(num) {
            var wholeNum = num.match(/[0-9]/g).reverse().join("").match(/[0-9]{1,3}/g).join(",").match(/./g).reverse().join("");
            var resultNum = wholeNum + decimalNum;
            $(this).val(resultNum);
        }
        else
        {
            $(this).val(num);
        }
    }
});