/*********************************************
* ÆÄÀϸí: lib.validate.js
* ±â´É: À¯¿¬ÇÑ ÀÚµ¿ Æû °Ë»ç±â
* ¸¸µçÀÌ: °ÅÄ£¸¶·ç <comfuture@maniacamp.com>
* ¼ö  Á¤: Àü¿µ±Ô <jeon@needok.com>
* ³¯Â¥: 2002-10-01
* == change log ==
* 2003-10-02 ¿©·¯Ä­À¸·Î ³ª´²Áø Ç׸ñ¿¡ ´ëÇÑ °Ë»ç±â´É Ãß°¡
* 2003-10-02 Æнº¿öµåµî µÎ°³ Ç׸ñ¿¡ ´ëÇÑ ºñ±³ ±â´É Ãß°¡
* 2003-10-03 jeon. ±æÀÌÁ¦Çѹæ¹ý º¯°æ, ÆÐÅÏüũ º¯°æ
**********************************************/

/// ¿¡·¯¸Þ½ÃÁö Æ÷¸ä Á¤ÀÇ ///
var NO_BLANK = "{name+Àº´Â} ÇʼöÇ׸ñÀÔ´Ï´Ù";
var NOT_VALID = "{name+ÀÌ°¡} ¿Ã¹Ù¸£Áö ¾Ê½À´Ï´Ù";
// var TOO_LONG = "{name}ÀÇ ±æÀÌ°¡ ÃÊ°úµÇ¾ú½À´Ï´Ù (ÃÖ´ë {maxbyte}¹ÙÀÌÆ®)";

/// ½ºÆ®¸µ °´Ã¼¿¡ ¸Þ¼Òµå Ãß°¡ ///
String.prototype.trim = function(str) { 
    str = this != window ? this : str; 
    return str.replace(/^\s+/g,'').replace(/\s+$/g,''); 
}

String.prototype.hasFinalConsonant = function(str) {
    str = this != window ? this : str; 
    var strTemp = str.substr(str.length-1);
    return ((strTemp.charCodeAt(0)-16)%28!=0);
}

String.prototype.bytes = function(str) {
    str = this != window ? this : str;
    var len = 0; //bug. ÀÌ ÇÑÁÙ¶§¹®¿¡ °í»ýÀ».. ³Ö¾îÁÖ¼¼¿ä. -_-;; 
    for(j=0; j<str.length; j++) {
        var chr = str.charAt(j);
        len += (chr.charCodeAt() > 128) ? 2 : 1
    }
    return len;
}

function validate(form) {
    for (i = 0; i < form.elements.length; i++ ) {
        var el = form.elements[i];
        if (el.tagName == "FIELDSET") continue;
        el.value = el.value.trim();

        var fs = el.getAttribute("FS");
        var minbyte = null;
        var maxbyte = null;
        var option = el.getAttribute("OPTION");
        var match = el.getAttribute("MATCH");
        var glue = el.getAttribute('GLUE');

        if(fs != null) {
            minbyte = fs.split("_")[0];
            maxbyte = fs.split("_")[1];
        }
        if (el.getAttribute("REQUIRED") != null) {
            if (el.value == null || el.value == "") {
                return doError(el,NO_BLANK);
            }
        }

        if (minbyte != null) {
            if (el.value.bytes() < parseInt(minbyte)) {
                return doError(el,"{name+Àº´Â} ÃÖ¼Ò "+minbyte+"¹ÙÀÌÆ® ÀÌ»ó ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù.");
            }
        }

        if (maxbyte != null && el.value != "") {
            var len = 0;
            if (el.value.bytes() > parseInt(maxbyte)) {
                return doError(el,"{name}ÀÇ ±æÀÌ´Â ÃÖ´ë "+maxbyte+"¹ÙÀÌÆ® ÀÔ´Ï´Ù.");
            }
        }

        if (match && (el.value != form.elements[match].value)) return doError(el,"{name+ÀÌ°¡} ÀÏÄ¡ÇÏÁö ¾Ê½À´Ï´Ù");

        if (option != null && el.value != "") {
            if (el.getAttribute('SPAN') != null) {
                var _value = new Array();
                for (span=0; span<el.getAttribute('SPAN');span++ ) {
                    _value[span] = form.elements[i+span].value;
                }
                var value = _value.join(glue == null ? '' : glue);
                if (!funcs[option](el,value)) return false;
            } else {
                if (!funcs[option](el)) return false;
            }
        }
    }
    return true;
}

function josa(str,tail) {
    return (str.hasFinalConsonant()) ? tail.substring(0,1) : tail.substring(1,2);
}

function doError(el,type,action) {
    var pattern = /{([a-zA-Z0-9_]+)\+?([°¡-Èþ]{2})?}/;
    var name = (hname = el.getAttribute("HNAME")) ? hname : el.getAttribute("NAME");
    pattern.exec(type);
    var tail = (RegExp.$2) ? josa(eval(RegExp.$1),RegExp.$2) : "";
    
	/*
	// ¿øº»
	alert(type.replace(pattern,eval(RegExp.$1) + tail));
	*/
	/*
	// ¼öÁ¤º»
	*/
    var error = (herror = el.getAttribute("HERROR")) ? herror : type.replace(pattern,eval(RegExp.$1) + tail);
    alert(error);

	if (action == "sel") {
        el.select();
    } else if (action == "del")    {
        el.value = "";
    }
    el.focus();
    return false;
}

/// Ư¼ö ÆÐÅÏ °Ë»ç ÇÔ¼ö ¸ÅÇÎ ///
/// Id, Num, Eng, Han.
var funcs = new Array();

funcs['Id']     = onlyId;             //    /^[a-zA-Z]{1}[a-zA-Z0-9_]+$/_
funcs['PASS']     = onlyPass;             //    /^[a-z0-9]+$/_
funcs['Num']     = onlyNum;            //    /^[0-9]+$/
funcs['Eng']     = onlyEng;              //    /^[a-zA-Z]+$/
funcs['EngNum'] = onlyEngNum;        //    /^[a-zA-Z0-9]+$/
funcs['Han']     = onlyHan;            //    /^[°¡-ÆR]+$/
funcs['HanEng']    = onlyHanEng;        //    /^[°¡-ÆRa-zA-Z]+$/
funcs['HanEngNum']    = onlyHanEngNum;//    /^[°¡-ÆRa-zA-Z0-9]+$/
funcs['HanNum']    = onlyHanNum;        //    /^[°¡-ÆR0-9]+$/
funcs['Han1']    = onlyHan1;        //    ¹Ýµå½Ã ÇÑ±Û Æ÷ÇÔ

funcs['email'] = isValidEmail;
funcs['phone'] = isValidPhone;
funcs['jumin'] = isValidJumin;
funcs['bizno'] = isValidBizNo;
funcs['domain'] = isValidDomain;

/// ÆÐÅÏ °Ë»ç ÇÔ¼öµé ///
function onlyId(el) {
    var pattern = /^[a-zA-Z]{0}[a-z0-9_]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} 3~12ÀÚÀÇ ¿µ¹® ¼Ò¹®ÀÚ, ¼ýÀÚ¿Í Æ¯¼ö±âÈ£(_) ¸¸ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.");
}
function onlyPass(el) {
    var pattern = /^[a-z0-9]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} 6~12ÀÚÀÇ ¿µ¹® ¼Ò¹®ÀÚ¿Í ¼ýÀÚ¸¸ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.");
}
function onlyNum(el) {
    var pattern = /^[0-9]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ¼ýÀڷθ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}

function onlyEng(el) {
    var pattern = /^[a-zA-Z]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ¿µ¹®Àڷθ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}
function onlyEngNum(el) {
    var pattern = /^[a-zA-Z0-9]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ¿µ¹®ÀÚ,¼ýÀڷθ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}
function onlyHan(el) {
    var pattern = /^[°¡-ÆR]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã Çѱ۷θ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}
function onlyHanEng(el) {
    var pattern = /^[°¡-ÆRa-zA-Z]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ÇѱÛ,¿µ¹®Àڷθ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}
function onlyHanEngNum(el) {
    var pattern = /^[°¡-ÆRa-zA-Z0-9]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ÇѱÛ,¿µ¹®ÀÚ,¼ýÀڷθ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}

function onlyHanNum(el) {
    var pattern = /^[°¡-ÆR0-9]+$/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ÇѱÛ,¼ýÀڷθ¸ ÀÔ·ÂÇØ¾ß ÇÕ´Ï´Ù");
}

function onlyHan1(el) {
    var pattern = /[°¡-Èþ]/;
    return (pattern.test(el.value)) ? true : doError(el,"{name+Àº´Â} ¹Ýµå½Ã ÇѱÛÀ» Æ÷ÇÔÇØ¾ß ÇÕ´Ï´Ù");
}

function isValidEmail(el,value) {
    var value = value ? value : el.value;
    var pattern = /^[_a-zA-Z0-9-\.]+@[\.a-zA-Z0-9-]+\.[a-zA-Z]+$/;
    return (pattern.test(value)) ? true : doError(el,NOT_VALID);
}
function isValidPhone(el,value) {
    var pattern = /^([0]{1}[0-9]{1,2})-?([1-9]{1}[0-9]{2,3})-?([0-9]{4})$/;
    var num = value ? value : el.value;
    if (pattern.exec(num)) {
        if(RegExp.$1 == "011" || RegExp.$1 == "016" || RegExp.$1 == "017" || RegExp.$1 == "018" || RegExp.$1 == "019") {
            if (!el.getAttribute('SPAN')) el.value = RegExp.$1 + "-" + RegExp.$2 + "-" + RegExp.$3;
        }
        return true;
    } else {
        return doError(el,NOT_VALID);
    }
}
function isValidJumin(el,value) {
    var pattern = /^([0-9]{6})-?([0-9]{7})$/; 
    var num = value ? value : el.value;
    if (!pattern.test(num)) return doError(el,NOT_VALID); 
    num = RegExp.$1 + RegExp.$2;

    var sum = 0;
    var last = num.charCodeAt(12) - 0x30;
    var bases = "234567892345";
    for (var i=0; i<12; i++) {
        if (isNaN(num.substring(i,i+1))) return doError(el,NOT_VALID);
        sum += (num.charCodeAt(i) - 0x30) * (bases.charCodeAt(i) - 0x30);
    }
    var mod = sum % 11;
    return ((11 - mod) % 10 == last) ? true : doError(el,NOT_VALID);
}
function isValidBizNo(el, value) { 
    var pattern = /([0-9]{3})-?([0-9]{2})-?([0-9]{5})/; 
    var num = value ? value : el.value;
    if (!pattern.test(num)) return doError(el,NOT_VALID); 
    num = RegExp.$1 + RegExp.$2 + RegExp.$3;
    var cVal = 0; 
    for (var i=0; i<8; i++) { 
        var cKeyNum = parseInt(((_tmp = i % 3) == 0) ? 1 : ( _tmp  == 1 ) ? 3 : 7); 
        cVal += (parseFloat(num.substring(i,i+1)) * cKeyNum) % 10; 
    } 
    var li_temp = parseFloat(num.substring(i,i+1)) * 5 + '0'; 
    cVal += parseFloat(li_temp.substring(0,1)) + parseFloat(li_temp.substring(1,2)); 
    return (parseInt(num.substring(9,10)) == 10-(cVal % 10)%10) ? true : doError(el,NOT_VALID); 
}

function isValidDomain(el) {
    var pattern = /^.+(\.[a-zA-Z]{2,3})$/;
    return (pattern.test(el.value)) ? true : doError(el,NOT_VALID);
}

/*
function isValidDomain(el,value) {
    var value = value ? value : el.value;
    var pattern = new RegExp("^(http://)?(www\.)?([°¡-Èþa-zA-Z0-9-]+\.[a-zA-Z]{2,3}$)","i");
    if (pattern.test(value)) {
        el.value = RegExp.$3;
        return true;
    } else {
        return doError(el,NOT_VALID);
    }
}
*/
/*Æû°Ë»ç±â ³¡*/




// ÁֹιøÈ£¿¡¼­ »ý³â¿ùÀÏÀÚµ¿ÀÔ·Â
function setbirthdate()
{
	var form = document.f;
	var resd = form.memb_jumin1.value;

	if(resd.length == 6){
		form.birth_dt1.value = "19" + resd.substring(0, 2);
		form.birth_dt2.value = resd.substring(2, 4);
		form.birth_dt3.value = resd.substring(4, 6);
	}
}

// Æ÷Ä¿½º À̵¿
function next(str,order,size){     // ÁֹιøÈ£ valid check , ÀÚµ¿ ´ÙÀ½ Æû À̵¿ // next(ÆûÀ̸§,hiddenÀ» Æ÷ÇÔÇÑ elements ÀÇ ¼ø¹ø (0ºÎÅͽÃÀÛÇÔ) , ¸îÀÚ¸¦ °Ë»çÇÒ°ÇÁö)

   nex = order + 1;
   pre = order - 1;
   num = str.elements[order].value;
   siz = num.length;
   numFlag = Number(num);
   if(!numFlag && siz > 1 && num != '00' &&  num != '000'){
         alert('¼ýÀÚ¸¦ ³Ö¾îÁÖ¼¼¿ä');
         str.elements[order].select();
         str.elements[order].focus();
         return false;
   }
   
    if(order == 6 && siz == 13){             //order °ª , siz °ª º¯µ¿½Ã ¼öÁ¤ÇÒ°Í ( element¼ø¹ø , °Ë»çÇÒ°³¼ö )
        //jumin = str.elements[pre].value + str.elements[order].value;
       
        jumin = str.elements[order].value;

        if(!check_juminno(jumin)){
            str.elements[order].select();
            str.elements[order].focus();
         return false;
        }	
   }
   
   if(siz == size){
      str.elements[nex].focus();
      return true;
   }
   
}

// ¿Â¶óÀÎ ¹®ÀÇ
function service(){
	window.open('service.htm','service','width=420, height=433, toolbars=no, menubar=no, scrollbars=no');
}





function popUp(theUrl,etc) { 

var imgwin = window.open(theUrl,'WIN',etc); 
imgwin.focus(); 
} 

function popUpCenter(theUrl,w,h) { 
var height = screen.height; 
var width = screen.width; 
var leftpos = width / 2 - 150; 
var toppos = height / 2 - 100; 
//var url = 'viewer.html?pic='+encode(what); 
var imgwin = window.open(theUrl,'WIN','scrollbars=auto,status=no,toolbar=no,resizable=1,location=no,menu=no,width='+w+',height='+h+',left=' + leftpos + ',top=' + toppos); 
imgwin.focus(); 
} 

function getParams() { 
var idx = document.URL.indexOf('?'); 
var params = new Array(); 
if (idx != -1) { 
var pairs = document.URL.substring(idx+1, document.URL.length).split('&'); 
for (var i=0; i<pairs.length; i++) { 
nameVal = pairs[i].split('='); 
params[nameVal[0]] = nameVal[1]; 
   } 
} 
return params; 
} 
params = getParams(); 


function PopUp(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}




// checkbox ¸ðµÎ ¼±ÅÃÇϱâ ÇÔ¼ö
CheckboxFlag=false;

function CheckAllForCheckbox(ElementName){

    var EleSize=ElementName.length;
    var i=0;

    if(!CheckboxFlag){

        if(!EleSize){

            ElementName.checked=true;

        }else{

            for(i;EleSize>i;++i){

                ElementName[i].checked=true;

            }

        }

        CheckboxFlag=true;

    }else{

        if(!EleSize){

            ElementName.checked=false;

        }else{

            for(i;EleSize>i;++i){

                ElementName[i].checked=false;

            }

        }

        CheckboxFlag=false;

    }

}

// »ø·¢Æ®¹Ú½º ¸ðµÎ ¼±ÅÃÇϱâ ÇÔ¼ö
SelectboxFlag=false;

function CheckAllForSelectbox(ElementName){

    var EleSize=ElementName.options.length;
    var i=0;

    

    if(!SelectboxFlag){

        for(i;EleSize>i;++i){

            ElementName.options[i].selected=true;
            SelectboxFlag=true;

        }

    }else{

        for(i;EleSize>i;++i){

            ElementName.options[i].selected=false;
            SelectboxFlag=false;

        }

    }

}

// Àç¿Ü±¹ÀÎ ¹øÈ£ üũ
function check_fgnno(fgnno) {
        var sum=0;
        var odd=0;
        buf = new Array(13);
        for(i=0; i<13; i++) { buf[i]=parseInt(fgnno.charAt(i)); }
        odd = buf[7]*10 + buf[8];
        if(odd%2 != 0) { return false; }
        if( (buf[11]!=6) && (buf[11]!=7) && (buf[11]!=8) && (buf[11]!=9) ) {
                return false;
        }
        multipliers = [2,3,4,5,6,7,8,9,2,3,4,5];
        for(i=0, sum=0; i<12; i++) { sum += (buf[i] *= multipliers[i]); }
        sum = 11 - (sum%11);
        if(sum >= 10) { sum -= 10; }
        sum += 2;
        if(sum >= 10) { sum -= 10; }
        if(sum != buf[12]) { return false }
        return true;
}

// ÁֹιøÈ£ üũ
function check_juminno(juminno) {
        if(juminno=="" || juminno==null || juminno.length!=13) {
                alert("Áֹεî·Ï¹øÈ£¸¦ Àû¾îÁÖ¼¼¿ä.");
                return false;
        }
        var jumin1 = juminno.substr(0,6);
        var jumin2 = juminno.substr(6,7);
        var yy           = jumin1.substr(0,2);        // ³âµµ
        var mm     = jumin1.substr(2,2);        // ¿ù
        var dd     = jumin1.substr(4,2);        // ÀÏ
        var genda  = jumin2.substr(0,1);        // ¼ºº°
        var msg, ss, cc;

        // ¼ýÀÚ°¡ ¾Æ´Ñ °ÍÀ» ÀÔ·ÂÇÑ °æ¿ì
        if (!isNumeric(jumin1)) {
                alert("Áֹεî·Ï¹øÈ£ ¾ÕÀÚ¸®¸¦ ¼ýÀÚ·Î ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // ±æÀÌ°¡ 6ÀÌ ¾Æ´Ñ °æ¿ì
        if (jumin1.length != 6) {
                alert("Áֹεî·Ï¹øÈ£ ¾ÕÀÚ¸®¸¦ ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // ù¹ø° ÀÚ·á¿¡¼­ ¿¬¿ùÀÏ(YYMMDD) Çü½Ä Áß ±âº» ±¸¼º °Ë»ç
        if (yy < "00" || yy > "99" ||
                mm < "01" || mm > "12" ||
                dd < "01" || dd > "31") {
                alert("Áֹεî·Ï¹øÈ£ ¾ÕÀÚ¸®¸¦ ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // ¼ýÀÚ°¡ ¾Æ´Ñ °ÍÀ» ÀÔ·ÂÇÑ °æ¿ì
        if (!isNumeric(jumin2)) {
                alert("Áֹεî·Ï¹øÈ£ µÞÀÚ¸®¸¦ ¼ýÀÚ·Î ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // ±æÀÌ°¡ 7ÀÌ ¾Æ´Ñ °æ¿ì
        if (jumin2.length != 7) {
                alert("Áֹεî·Ï¹øÈ£ µÞÀÚ¸®¸¦ ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // ¼ºº°ºÎºÐÀÌ 1 ~ 4 °¡ ¾Æ´Ñ °æ¿ì
        if (genda < "1" || genda > "4") {
                alert("Áֹεî·Ï¹øÈ£ µÞÀÚ¸®¸¦ ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // ¿¬µµ °è»ê - 1 ¶Ç´Â 2: 1900³â´ë, 3 ¶Ç´Â 4: 2000³â´ë
        cc = (genda == "1" || genda == "2") ? "19" : "20";
        // ù¹ø° ÀÚ·á¿¡¼­ ¿¬¿ùÀÏ(YYMMDD) Çü½Ä Áß ³¯Â¥ Çü½Ä °Ë»ç
        if (isYYYYMMDD(parseInt(cc+yy), parseInt(mm), parseInt(dd)) == false) {
                alert("Áֹεî·Ï¹øÈ£ ¾ÕÀÚ¸®¸¦ ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        // Check Digit °Ë»ç
        if (!isSSN(jumin1, jumin2)) {
                alert("ÀÔ·ÂÇÑ Áֹεî·Ï¹øÈ£¸¦ °ËÅäÇÑ ÈÄ, ´Ù½Ã ÀÔ·ÂÇϼ¼¿ä.");
                return false;
        }
        return true;
}

// »ç¾÷ÀÚµî·Ï¹øÈ£ üũ
function check_busino(vencod) {
        var sum = 0;
        var getlist =new Array(10);
        var chkvalue =new Array("1","3","7","1","3","7","1","3","5");
        for(var i=0; i<10; i++) { getlist[i] = vencod.substring(i, i+1); }
        for(var i=0; i<9; i++) { sum += getlist[i]*chkvalue[i]; }
        sum = sum + parseInt((getlist[8]*5)/10);
        sidliy = sum % 10;
        sidchk = 0;
        if(sidliy != 0) { sidchk = 10 - sidliy; }
        else { sidchk = 0; }
        if(sidchk != getlist[9]) { return false; }
        return true;
}


function isYYYYMMDD(y, m, d) {
        switch (m) {
        case 2:        // 2¿ùÀÇ °æ¿ì
                if (d > 29) return false;
                if (d == 29) {
                        // 2¿ù 29ÀÇ °æ¿ì ´çÇØ°¡ À±³âÀÎÁö¸¦ È®ÀÎ
                        if ((y % 4 != 0) || (y % 100 == 0) && (y % 400 != 0))
                                return false;
                }
                break;
        case 4:        // ÀÛÀº ´ÞÀÇ °æ¿ì
        case 6:
        case 9:
        case 11:
                if (d == 31) return false;
        }
        // Å« ´ÞÀÇ °æ¿ì
        return true;
}
function isNumeric(s) {
        for (i=0; i<s.length; i++) {
                c = s.substr(i, 1);
                if (c < "0" || c > "9") return false;
        }
        return true;
}
function isLeapYear(y) {
        if (y < 100)
        y = y + 1900;
        if ( (y % 4 == 0) && (y % 100 != 0) || (y % 400 == 0) ) {
                return true;
        } else {
                return false;
        }
}
function getNumberOfDate(yy, mm) {
        month = new Array(29,31,28,31,30,31,30,31,31,30,31,30,31);
        if (mm == 2 && isLeapYear(yy)) mm = 0;
        return month[mm];
}
function isSSN(s1, s2) {
        n = 2;
        sum = 0;
        for (i=0; i<s1.length; i++)
                sum += parseInt(s1.substr(i, 1)) * n++;
        for (i=0; i<s2.length-1; i++) {
                sum += parseInt(s2.substr(i, 1)) * n++;
                if (n == 10) n = 2;
        }
        c = 11 - sum % 11;
        if (c == 11) c = 1;
        if (c == 10) c = 0;
        if (c != parseInt(s2.substr(6, 1))) return false;
        else return true;
}