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// $Id: date_emailcheck.js,v 1.1.1.1 2005/09/08 13:54:55 ikrizanovic Exp $

function emailCheck (emailStr) {
/* 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. 
   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=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
   non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
   For example, in , john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* 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("Email address seems incorrect (check @ and .'s)")
	//alert("Ihre Email-Adresse scheint nicht korrekt zu sein!")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    //alert("The username doesn't seem to be valid.")
    //alert("Ihr Username darf nur aus Buchstaben und Zahlen bestehen,\n Leerzeichen sind nicht erlaubt")
	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("Destination IP address is invalid!")
			//alert("Ueberpruefen Sie Ihrer Email-Adresse!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	//alert("The domain name doesn't seem to be valid.")
	//alert("Ueberpruefen Sie Ihrer Email-Adresse!")
    return false
}

/* domain name seems valid, but now make sure that it ends in a
   three-letter word (like com, edu, gov) or a two-letter word,
   representing country (uk, nl), and that there's a hostname preceding 
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>20) {
   // the address must end in at least two letters.
   // new TLDs like 'museum' are allowed.
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   //var errStr="This address is missing a hostname!"
   var errStr="Ueberpruefen Sie Ihrer Email-Adresse!"
   //alert(errStr)
   return false
}

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

//
//
//
//
// Date validator
//
//
//
//


function chkdate(objName) {

//var strDatestyle = "US"; //United States date style
var strDatestyle = "EU";  //European date style
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
//var strSeparatorArray = new Array("-"," ","/",".");
var strSeparatorArray = new Array(".");
var intElementNr;
var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "01";
strMonthArray[1] = "02";
strMonthArray[2] = "03";
strMonthArray[3] = "04";
strMonthArray[4] = "05";
strMonthArray[5] = "06";
strMonthArray[6] = "07";
strMonthArray[7] = "08";
strMonthArray[8] = "09";
strMonthArray[9] = "10";
strMonthArray[10] = "11";
strMonthArray[11] = "12";
strDate = datefield.value;

if (strDate.length < 1) {
  return false;
}

if (strDate.length > 10) {
  return false;
}


for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
  if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
    strDateArray = strDate.split(strSeparatorArray[intElementNr]);
    if (strDateArray.length != 3) {
        err = 1;
        return false;
    }
    else {
        strDay = strDateArray[0];
        strMonth = strDateArray[1];
        strYear = strDateArray[2];
    }
    booFound = true;
  }
}

if (booFound == false) {
  if (strDate.length>5) {
     strDay = strDate.substr(0, 2);
     strMonth = strDate.substr(2, 2);
     strYear = strDate.substr(4);
  }
}

// US style
if (strDatestyle == "US") {
   strTemp = strDay;
   strDay = strMonth;
   strMonth = strTemp;
}

intday = parseInt(strDay, 10);
if (isNaN(intday)) {
  err = 2;
  return false;
}

intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
  for (i = 0;i<12;i++) {
    if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
      intMonth = i+1;
      strMonth = strMonthArray[i];
      i = 12;
    }
  }
  if (isNaN(intMonth)) {
    err = 3;
    return false;
  }
}

intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
   err = 4;
   return false;
}
if (intMonth>12 || intMonth<1) {
   err = 5;
   return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
   err = 6;
   return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
   err = 7;
   return false;
}
if (intMonth == 2) {
   if (intday < 1) {
     err = 8;
     return false;
   }
   if (LeapYear(intYear) == true) {
      if (intday > 29) {
        err = 9;
        return false;
      }
   }
   else {
     if (intday > 28) {
       err = 10;
       return false;
     }
   }
}
if (strDatestyle == "US") {
  datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;
}
else {
  intday   = intday.toString();
  intMonth = intMonth.toString();
  strYear  = strYear.toString();
  if (strYear.length < 4) {
    return false;
  }
  //if (strYear.length == 2) {
  //  strYear = '20' + strYear;
  //}  
  if (intday.length < 2) {
    intday = '0' + intday;
  }
  if (intMonth.length < 2) {
    intMonth = '0' + intMonth;
  }
  datefield.value = intday + "." + strMonthArray[intMonth-1] + "." + strYear;
}

return true;
} // end of function


function LeapYear(intYear) {
  if (intYear % 100 == 0) {
    if (intYear % 400 == 0) { return true; }
  }
  else {
    if ((intYear % 4) == 0) { return true; }
  }
  return false;
}
// end date validation functions


// Check if a specific field is blank or not (space, tab or newline is counted as blank)
function isblank(s) {
    if ((s==null) || (s=="")) return true;

    for (var i = 0; i<s.length; i++) {
        var c = s.charAt(i);
        if ((c!=" ") && (c!="\n") && (c!="\t")) return false;
    }

	return true;
}


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