[javascript] sms 발송시 80byte 글자제한 체크하기

  function chkStrLength(obj){ 
        var strValue = obj.value;
        var strLen = strValue.length;
        var totalByte = 0;
        var len = 0;
        var oneChar = "";
        var str2 = "";

 
        for (var i = 0; i < strLen; i++) {
            oneChar = strValue.charAt(i);
            if (escape(oneChar).length > 4) {
                totalByte += 2;
            } else {
                totalByte++;
            }
        
         
            len = i + 1;
           
        }
        return totalByte; 
    }