Input 창에 숫자 입력시 콤마(,) 표시하기 ###,###,###

<script>

function number_chk(obj){

var val = obj.value.replace(/,/g, "");

var val2 = val.substr(0, 1);

var val3 = val.length;

if(val2 == 0){

val = val.substr(1, val3);

}

obj.value = num_format(val);

}

function num_format(n){

var reg = /(^[+-]?\d+)(\d{3})/;   // 정규식

n = String(n);    //숫자 -> 문자변환

while(reg.test(n)){

n = n.replace(reg, "$1" + "," + "$2");

}

return n;

}

</script>

 

<input type="text" name="comma" id="comma" onkeyup="number_chk(this);" onkeypress="javascript:if((event.keyCode<48)||(event.keyCode>57))event.returnValue=false;" style="ime-mode:disabled; text-align: right;" />