[자바스크립트]금액관련포맷, 콤마찍기

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<script>
$(document).ready(function(){
    //키를 누르거나 떼었을때 이벤트 발생
    $("input").bind('keyup keydown',function(){
        inputNumberFormat(this);
    });

    //입력한 문자열 전달
    function inputNumberFormat(obj) {
        obj.value = comma(uncomma(obj.value));
    }
      
    //콤마찍기
    function comma(str) {
        str = String(str);
        return str.replace(/(\d)(?=(?:\d{3})+(?!\d))/g, '$1,');
    }

    //콤마풀기
    function uncomma(str) {
        str = String(str);
        return str.replace(/[^\d]+/g, '');
    }

    //숫자만 리턴(저장할때)
    //alert(cf_getNumberOnly('1,2./3g')); -> 123 return
    function cf_getNumberOnly (str) {
        var len      = str.length;
        var sReturn  = "";

        for (var i=0; i<len; i++){
            if ( (str.charAt(i) >= "0") && (str.charAt(i) <= "9") ){
                sReturn += str.charAt(i);
            }
        }
        return sReturn;
    }
});
</script>