//**********************************************//
// FORMAT CHECK FUNCTIONS (email, date, ...) - start
//**********************************************//

function emailCheck (emailStr) {
	/* The following variable tells the rest of the function whether or not
	to verify that the address ends in a two-letter country or well-known
	TLD.  1 means check it, 0 means don't. */
	var checkTLD=1;

	/* The following is the list of known TLDs that an e-mail address must end with. */
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

	/* The following pattern is used to check if the entered e-mail address
	fits the user@domain format.  It also is used to separate the username
	from the domain. */
	var emailPat=/^(.+)@(.+)$/;

	/* The following string represents the pattern for matching all special
	characters.  We don't want to allow special characters in the address. 
	These characters include ( ) < > @ , ; : \ " . [ ] */
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";

	/* The following string represents the range of characters allowed in a 
	username or domainname.  It really states which chars aren't allowed.*/
	var validChars="\[^\\s" + specialChars + "\]";

	/* The following pattern applies if the "user" is a quoted string (in
	which case, there are no rules about which characters are allowed
	and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
	is a legal e-mail address. */
	var quotedUser="(\"[^\"]*\")";

	/* The following pattern applies for domains that are IP addresses,
	rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
	e-mail address. NOTE: The square brackets are required. */
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

	/* The following string represents an atom (basically a series of non-special characters.) */
	var atom=validChars + '+';

	/* The following string represents one word in the typical username.
	For example, in john.doe@somewhere.com, john and doe are words.
	Basically, a word is either an atom or quoted string. */
	var word="(" + atom + "|" + quotedUser + ")";

	// The following pattern describes the structure of the user
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

	/* The following pattern describes the structure of a normal symbolic
	domain, as opposed to ipDomainPat, shown above. */
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	/* Finally, let's start trying to figure out if the supplied address is valid. */
	/* Begin with the coarse pattern to simply break up user@domain into
	different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat);

	if (matchArray==null) {
	  /* Too many/few @'s or something; basically, this address doesn't
	  even fit the general mould of a valid e-mail address. */
	  alert("メールアドレスが不正です");
	  return false;
	}

	var user=matchArray[1];
	var domain=matchArray[2];
	// Start by checking that only basic ASCII characters are in the strings (0-127).
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("メールアドレスに不正な文字が含まれています");
			return false;
		}
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("メールアドレスのドメインに不正な文字が含まれています");
			return false;
		  }
	}

	// See if "user" is valid 

	if (user.match(userPat)==null) {
	// user is not valid
		alert("メールアドレスの形式が正しくありません");
		return false;
	}

	/* if the e-mail address is at an IP address (as opposed to a symbolic
	host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		// this is an IP address
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("メールアドレスの形式が正しくありません");
				return false;
			}
		}
		return true;
	}

	// Domain is symbolic name.  Check if it's valid. 
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert("メールアドレスの形式が正しくありません");
			return false;
		}
	}

	/* domain name seems valid, but now make sure that it ends in a
	known top-level domain (like com, edu, gov) or a two-letter word,
	representing country (uk, nl), and that there's a hostname preceding 
	the domain or country. */
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("メールアドレスの形式が正しくありません");
		return false;
	}

	// Make sure there's a host name preceding the domain.
	if (len<2) {
		alert("メールアドレスが正しく入力されていません");
		return false;
	}

	// If we've gotten this far, everything's valid!
	return true;
}
//  End -->

// Declaring valid date character, minimum year and maximum year
var dtCh = "/";
var minYear = 1900;
var maxYear = 2100;

function isInteger(s) {
	var i;
    for (i = 0; i < s.length; i++) {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (c<"0" || c > "9")
			return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag) {
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++) {   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1)
			returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31;
		if (i==4 || i==6 || i==9 || i==11) { this[i] = 30; }
		if (i==2) { this[i] = 29; }
   } 
   return this
}

function isDate(dtStr) {
	var daysInMonth = DaysArray(12);
	var pos1 = dtStr.indexOf(dtCh);
	var pos2 = dtStr.indexOf(dtCh,pos1+1);
	var strYear = dtStr.substring(0,pos1);
	var strMonth = dtStr.substring(pos1+1,pos2);
	var strDay = dtStr.substring(pos2+1);
	strYr = strYear;
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay = strDay.substring(1);
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth = strMonth.substring(1);
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) { strYr = strYr.substring(1); }
	}
	month = parseInt(strMonth);
	day = parseInt(strDay);
	year = parseInt(strYr);
	if (pos1!=4 || pos2==-1 || pos2>7){
		alert("日付はYYYY/MM/DDの形式で入力して下さい");
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear) {
		alert("西暦は4桁で入力して下さい（"+minYear+"-"+maxYear);
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12) {
		alert("月は1〜12の数値を入力して下さい");
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]) {
		alert("正確な日付を入力して下さい");
		return false;
	}
	
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false) {
		alert("正確な日付を入力して下さい");
		return false;
	}
	return true;
}

function checkStr(strvalue, strtype, must) {
  // strtype -> 1 = fixed phone number; 2 = mobile phone number; 3 = ZIP code
  // must -> 0 = optional; 1 = compulsory;
  if (must == 1 && strvalue == "") {
    switch(strtype) {
	  case 1: // fixed phone number
	    alert("電話番号が入力されていません。");
	    break;
		
	  case 2: // mobile phone number;
	    alert("携帯電話番号が入力されていません。");
	    break;
		
	  case 3: // ZIP code
        alert("郵便番号が入力されていません。");
		break;あｓだあｓ
	}	
    return false;
  }
  else if (strvalue != "") {

	switch(strtype) {
	  case 1: // fixed phone number
	    var tel_reg = new RegExp("^\\d{2,5}-\\d{1,4}-\\d{4}$");
		var tel2_reg = new RegExp("^\\d{4}-\\d{2,4}-\\d{4}$");
		var tel3_reg = new RegExp("^\\d{3}-\\d{4}-\\d{4}$"); // VOPI number
		if (strvalue.length==11 || strvalue.length==12 || strvalue.length==13 || strvalue.length==14) {
          if (!strvalue.match(tel_reg) && !strvalue.match(tel2_reg) && !strvalue.match(tel3_reg)) {
            alert("電話番号・IP電話番号の形式に誤りがあります。");
            response = false;
          } else {
            response = true;
          }
        } else {
          alert("電話番号・IP電話番号の桁数に誤りがあります。");
          response = false;
        }
		break;
		
	  case 2: // mobile phone number;
	    var port_reg = new RegExp("^0[0-9]0-\\d{4}-\\d{4}$");
		if (!strvalue.match(port_reg)) {
          alert("携帯電話・PHS・IP電話番号に誤りがあります。");
          response = false;
        } else {
          response = true;
        }
		break;
		
	  case 3: // ZIP code
        var zip_reg = new RegExp("^\\d{3}-\\d{4}$");
		if (!strvalue.match(zip_reg)) {
          alert("郵便番号に誤りがあります。");
          response = false;
        } else {
          response = true;
        }
		break;
		
	  default:
		response = false;
		break;
	}
  }
  else {
    response = true;
  }
  return response;
}

function alphanumCheck(strToCheck, checkType) {
	var response = true;
	
	switch(checkType) {
		
		// only digits
		case 1:
			if (strToCheck.match( /[^0-9]+/ ))
				response = false;
			break;
		
		// only digits and space
		case 2:
			if (strToCheck.match( /[^0-9\s]+/ ))
				response = false;
			break;
		
		// only digits and hypher
		case 3:
			if (strToCheck.match( /[^0-9(\-)]+/ ))
				response = false;
			break;
		
		// only alphanumerical and space - NO symbols
		case 4:
			if (strToCheck.match( /[^A-Za-z0-9\s]+/ ))
				response = false;
			break;
			
		// only alphanumerical and symbols for names (english charset)
		case 5:
			if (strToCheck.match( /[^A-Za-z\s\-\'\`]+/ ))
				response = false;
			break;
		
		// only NON alphanumerical  (that is symbols, space, kana and kanji)
		case 6:
			if (strToCheck.match( /[A-Za-z0-9]+/ ))
				response = false;
			break;
		
		// only digits, coma and dot
		case 7:
			if (strToCheck.match( /[^0-9\,\.]+/ ))
				response = false;
			break;
			
		default:
			response = false;
			break;
	}
	return response;
}