전화번호 자동 정리 - 전화번호 하이픈 넣기

 <script> 

function normalize_phonenum(num)

{

    num.value = num.value.toString().replace(/(0(?:2|[0-9]{2}))([0-9]+)([0-9]{4}$)/,"$1-$2-$3");

}

//정규식을 이용한 방법을 수정한 것

function ck_telephone(num)

   {

   //02-281-4248;  --> 9

   //052-281-4248;  --> 10

   //052-2281-4248;  --> 11

   //0522-281-4248;  --> 11

   bs_number = num.value.toString();

   bs_number = bs_number.replace(/[^0-9]/g,'');

   bs_number_length = bs_number.length;

   t_limit1 = 2 // 처음 번호까지 거리

   bs_1 = '';

   bs_2 = '';

   t_limit1 = 0;

   if(bs_number_length >= 9){

    ck_1 = bs_number.substr(0, 2);

    if(ck_1 != '02'){ t_limit1 = 3; }else{ t_limit1 = 2; }

   }  

   t_st2 = 0;

   t_limit3 = 4;

   if(bs_number_length < 4) { t_limit3 = bs_number_length;}

   t_st2 = t_limit1;

   t_limit2 = bs_number_length -t_limit3-t_limit1;

   

   t_st3 = bs_number_length - t_limit3; if(t_st3 < 0 ) { t_st3 = 0 ; }

   result = '';

   bs_3 = bs_number.substr(t_st3, t_limit3);

   if(bs_number_length > 4 ){  bs_2 = bs_number.substr(t_st2, t_limit2); }

   if(bs_number_length >= 9  ){  bs_1 = bs_number.substr(0, t_limit1 );  }

   

    if(bs_3.length != 0)

    { result += bs_3; }

    if(bs_2.length != 0)

    { result = bs_2 +'-'+ result; }

    if(bs_1.length != 0)

    { result = bs_1 +'-'+ result; }

   

    num.value = result;

   }

</script> 

<input type="text" name="u_com_tel" id="u_com_tel" size="30" maxlength="50"  onChange="ck_telephone(this);" onBlur="ck_telephone(this);" >

<input type="text" name="u_com_tel2" id="u_com_tel2" size="30" maxlength="50"  onChange="normalize_phonenum(this);" onBlur="normalize_phonenum(this);" >

 예제 :