/**
 * ÀԷ°ªÀÌ NULLÀÎÁö üũ
 */
function isNull(input, alertName, check) {
    if (input.value == null || input.value == "") {
        alert(alertName);
        if (check == 1) {
            input.focus();
            input.select();
        }
        return true;
    }
    return false;
}

/**
 * ÀԷ°ª¿¡ ½ºÆäÀ̽º ÀÌ¿ÜÀÇ ÀǹÌÀÖ´Â °ªÀÌ ÀÖ´ÂÁö üũ
 * ex) if (isEmpty(form.keyword)) {
 *         alert("°Ë»öÁ¶°ÇÀ» ÀÔ·ÂÇϼ¼¿ä.");
 *     }
 */
function isEmpty(input) {
    if (input.value == null || input.value.replace(/ /gi,"") == "") {
        return true;
    }
    return false;
}

/**
 * ÀԷ°ª¿¡ ƯÁ¤ ¹®ÀÚ(chars)°¡ ÀÖ´ÂÁö üũ
 * ƯÁ¤ ¹®ÀÚ¸¦ Çã¿ëÇÏÁö ¾ÊÀ¸·Á ÇÒ ¶§ »ç¿ë
 * ex) if (containsChars(form.name,"!,*&^%$#@~;")) {
 *         alert("À̸§ Çʵ忡´Â Ư¼ö ¹®ÀÚ¸¦ »ç¿ëÇÒ ¼ö ¾ø½À´Ï´Ù.");
 *     }
 */
function containsChars(input,chars) {
    for (var inx = 0; inx < input.value.length; inx++) {
       if (chars.indexOf(input.value.charAt(inx)) != -1)
           return true;
    }
    return false;
}

/**
 * ÀԷ°ªÀÌ Æ¯Á¤ ¹®ÀÚ(chars)¸¸À¸·Î µÇ¾îÀÖ´ÂÁö üũ
 * ƯÁ¤ ¹®ÀÚ¸¸ Çã¿ëÇÏ·Á ÇÒ ¶§ »ç¿ë
 * ex) if (!containsCharsOnly(form.blood,"ABO")) {
 *         alert("Ç÷¾×Çü Çʵ忡´Â A,B,O ¹®ÀÚ¸¸ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.");
 *     }
 */
function containsCharsOnly(input,chars) {
    for (var inx = 0; inx < input.value.length; inx++) {
       if (chars.indexOf(input.value.charAt(inx)) == -1)
           return false;
    }
    return true;
}

/**
 * ÀԷ°ªÀÌ ¾ËÆĺªÀÎÁö üũ
 * ¾Æ·¡ isAlphabet() ºÎÅÍ isNumComma()±îÁöÀÇ ¸Þ¼Òµå°¡
 * ÀÚÁÖ ¾²ÀÌ´Â °æ¿ì¿¡´Â var chars º¯¼ö¸¦
 * global º¯¼ö·Î ¼±¾ðÇÏ°í »ç¿ëÇϵµ·Ï ÇÑ´Ù.
 * ex) var uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 *     var lowercase = "abcdefghijklmnopqrstuvwxyz";
 *     var number    = "0123456789";
 *     function isAlphaNum(input) {
 *         var chars = uppercase + lowercase + number;
 *         return containsCharsOnly(input,chars);
 *     }
 */
function isAlphabet(input) {
    var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    return containsCharsOnly(input,chars);
}

/**
 * ÀԷ°ªÀÌ ¾ËÆĺª ´ë¹®ÀÚÀÎÁö üũ
 */
function isUpperCase(input) {
    var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    return containsCharsOnly(input,chars);
}

/**
 * ÀԷ°ªÀÌ ¾ËÆĺª ¼Ò¹®ÀÚÀÎÁö üũ
 */
function isLowerCase(input) {
    var chars = "abcdefghijklmnopqrstuvwxyz";
    return containsCharsOnly(input,chars);
}

/**
 * ÀԷ°ª¿¡ ¼ýÀÚ¸¸ ÀÖ´ÂÁö üũ
 */
function isNumber(input) {
    var chars = "/0123456789";
    if (!containsCharsOnly(input,chars)) {
        alert("¼ýÀÚ¸¸ ÀÔ·ÂÇϼ¼¿ä.");
        input.focus();
        input.select();
        return true;
    }
    return false;
}

/**
 * ÀԷ°ªÀÌ ¾ËÆĺª,¼ýÀÚ·Î µÇ¾îÀÖ´ÂÁö üũ
 */
function isAlphaNum(input) {
    var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    return containsCharsOnly(input,chars);
}

/**
 * ÀԷ°ªÀÌ ¼ýÀÚ,´ë½Ã(-)·Î µÇ¾îÀÖ´ÂÁö üũ
 */
function isNumDash(input) {
    var chars = "-0123456789";
    return containsCharsOnly(input,chars);
}

/**
 * ÀԷ°ªÀÌ ¼ýÀÚ,ÄÞ¸¶(,)·Î µÇ¾îÀÖ´ÂÁö üũ
 */
function isNumComma(input) {
    var chars = ",0123456789";
    return containsCharsOnly(input,chars);
}

/**
 * ÀԷ°ªÀÌ »ç¿ëÀÚ°¡ Á¤ÀÇÇÑ Æ÷¸Ë Çü½ÄÀÎÁö üũ
 * ÀÚ¼¼ÇÑ format Çü½ÄÀº ÀÚ¹Ù½ºÅ©¸³Æ®ÀÇ 'regular expression'À» ÂüÁ¶
 */
function isValidFormat(input,format) {
    if (input.value.search(format) != -1) {
        return true; //¿Ã¹Ù¸¥ Æ÷¸Ë Çü½Ä
    }
    return false;
}

/**
 * ÀԷ°ªÀÌ À̸ÞÀÏ Çü½ÄÀÎÁö üũ
 * ex) if (!isValidEmail(form.email)) {
 *         alert("¿Ã¹Ù¸¥ À̸ÞÀÏ ÁÖ¼Ò°¡ ¾Æ´Õ´Ï´Ù.");
 *     }
 */
function isValidEmail(input) {
//    var format = /^(\S+)@(\S+)\.([A-Za-z]+)$/;
    var format = /^((\w|[\-\.])+)@((\w|[\-\.])+)\.([A-Za-z]+)$/;
    return isValidFormat(input,format);
}

/**
 * ÀԷ°ªÀÌ ÀüÈ­¹øÈ£ Çü½Ä(¼ýÀÚ-¼ýÀÚ-¼ýÀÚ)ÀÎÁö üũ
 */
function isValidPhone(input) {
    var format = /^(\d+)-(\d+)-(\d+)$/;
    return isValidFormat(input,format);
}

/**
 * ÀԷ°ªÀÇ ¹ÙÀÌÆ® ±æÀ̸¦ ¸®ÅÏ
 * ex) if (getByteLength(form.title) > 100) {
 *         alert("Á¦¸ñÀº ÇÑ±Û 50ÀÚ(¿µ¹® 100ÀÚ) ÀÌ»ó ÀÔ·ÂÇÒ ¼ö ¾ø½À´Ï´Ù.");
 *     }
 * Author : Wonyoung Lee
 */
function getByteLength(input) {
    var byteLength = 0;
    for (var inx = 0; inx < input.value.length; inx++) {
        var oneChar = escape(input.value.charAt(inx));
        if ( oneChar.length == 1 ) {
            byteLength ++;
        } else if (oneChar.indexOf("%u") != -1) {
            byteLength += 2;
        } else if (oneChar.indexOf("%") != -1) {
            byteLength += oneChar.length/3;
        }
    }
    return byteLength;
}

/**
 * ÀԷ°ª¿¡¼­ ÄÞ¸¶¸¦ ¾ø¾Ø´Ù.
 */
function removeComma(input) {
    return input.value.replace(/,/gi,"");
}

/**
 * ¼±ÅÃµÈ ¶óµð¿À¹öÆ°ÀÌ ÀÖ´ÂÁö üũ
 */
function hasCheckedRadio(input) {
    if (input.length > 1) {
        for (var inx = 0; inx < input.length; inx++) {
            if (input[inx].checked) return true;
        }
    } else {
        if (input.checked) return true;
    }
    return false;
}

/**
 * ¼±ÅÃµÈ Ã¼Å©¹Ú½º°¡ ÀÖ´ÂÁö üũ
 */
function hasCheckedBox(input) {
    return hasCheckedRadio(input);
}

/**
 * À¯È¿ÇÏ´Â(Á¸ÀçÇÏ´Â) Time ÀÎÁö üũ
 * ex) var time = form.time.value; //'200102310000'
 *     if (!isValidTime(time)) {
 *         alert("¿Ã¹Ù¸¥ ³¯Â¥°¡ ¾Æ´Õ´Ï´Ù.");
 *     }
 */
function isValidDate(toDate) {
    var year  = toDate.value.substring(0,4);
    var month = toDate.value.substring(5,7);
    var day   = toDate.value.substring(8,10);

    if (parseInt(year,10) >= 1900  && isValidMonth(month) &&
        isValidDay(year,month,day)) {
        return false;
    }
    alert("¿Ã¹Ù¸¥ ³¯Â¥°¡ ¾Æ´Õ´Ï´Ù.");
    toDate.focus();
    toDate.select();
    return true;
}

/**
 * À¯È¿ÇÑ(Á¸ÀçÇÏ´Â) ¿ù(êÅ)ÀÎÁö üũ
 */
function isValidMonth(mm) {
    var m = parseInt(mm,10);
    return (m >= 1 && m <= 12);
}

/**
 * À¯È¿ÇÑ(Á¸ÀçÇÏ´Â) ÀÏ(ìí)ÀÎÁö üũ
 */
function isValidDay(yyyy, mm, dd) {
    var m = parseInt(mm,10) - 1;
    var d = parseInt(dd,10);

    var end = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
    if ((yyyy % 4 == 0 && yyyy % 100 != 0) || yyyy % 400 == 0) {
        end[1] = 29;
    }

    return (d >= 1 && d <= end[m]);
}


function isDate(input, alertName) {
    if (input.value == null || input.value == "" || input.value.length < 10 ) {
        alert(alertName);
        input.focus();
        input.select();
        return true;
    }
    return false;
}

function isNumSlash(input) {
    var chars = "/0123456789";
    if (!containsCharsOnly(input,chars)) {
        alert("'¼ýÀÚ'¿Í'/' ¸¸ ÀÔ·ÂÇÒ¼ö ÀÖ½À´Ï´Ù.");
        input.focus();
        input.select();
        return true;
    }
    return false;
}

function isValidDateCheck(fromDate, toDate, alertName) {
    var fromYear  = fromDate.value.substring(0,4);
    var fromMonth = fromDate.value.substring(5,7);
    var fromDay   = fromDate.value.substring(8,10);
    var toYear    = toDate.value.substring(0,4);
    var toMonth   = toDate.value.substring(5,7);
    var toDay     = toDate.value.substring(8,10);
    if (parseInt(fromYear+fromMonth+fromDay) <= parseInt(toYear+toMonth+toDay)) {
         return false;
    }
    alert(alertName+" from ~ to¸¦ È®ÀÎÇϼ¼¿ä.");
    toDate.focus();
    toDate.select();
    return true;
}

function launchCenter(url, name, height, width) {
  var str = "height=" + height + ",innerHeight=" + height;
  str += ",width=" + width + ",innerWidth=" + width;
  if (window.screen) {
    var ah = screen.availHeight - 30;
    var aw = screen.availWidth - 10;

    var xc = (aw - width) / 2;
    var yc = (ah - height) / 2;

    str += ",left=" + xc + ",screenX=" + xc;
    str += ",top=" + yc + ",screenY=" + yc;
  }
  return window.open(url, name, str);
}