var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
  var keyCode = (isNN) ? e.which : e.keyCode; 
  var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
  if(input.value.length >= len && !containsElement(filter,keyCode)) {
    input.value = input.value.slice(0, len);
    input.form[(getIndex(input)+1) % input.form.length].focus();
  }
  return true;
}  

function containsElement(arr, ele) {
  var found = false, index = 0;
  while(!found && index < arr.length)
  if(arr[index] == ele)
    found = true;
  else
    index++;
  return found;
}

function getIndex(input) {
  var index = -1, i = 0, found = false;
  while (i < input.form.length && index == -1)
  if (input.form[i] == input)index = i;
    else i++;
  return index;
}

function isNumber(inputVal){
   var inputStr = inputVal.toString();
   for (var i = 0; i < inputStr.length; i++) {
       var oneChar = inputStr.charAt(i);
       if (oneChar < "0" || oneChar > "9") {
          return false;
       }
   }    
   return true;
}
  
function isDecimal(inputVal){
   var oneDecimal = false;
   var inputStr = inputVal.toString();
   for (var i = 0; i < inputStr.length; i++) {
       var oneChar = inputStr.charAt(i);

       if (oneChar == "." && !oneDecimal ) {
          oneDecimal = true;
          continue;
       }

       if (oneChar < "0" || oneChar > "9") {
          return false;
       }
   }    
   return true;
}
  
function isDate(inputVal){
   var len = inputVal.length;
   var yyyy = parseInt(inputVal.substring(0,4),10);
   var mm = parseInt(inputVal.substring(4,6),10);
   var dd = parseInt(inputVal.substring(6,8),10);

   if (len != 4  && len != 6 && len != 8) {
      return false;
   } 

   if (len > 4 ) {
      if (mm < 1 || mm > 12) {
         return false;
      } 
   } 
   if (len > 6 ) {
      if (dd < 1 || dd > 31) {
         return false;
      }
      if (!checkMonthLength(mm,dd)) {
	     return false;
	  }
	  if (mm == 2) {
         if (dd > 29) {
		    return false;
	     }	   
	     if (!checkLeapMonth(mm,dd,yyyy)){
	        return false;  	 
		 }
	  }
   } 
   return true;
}

function checkMonthLength(mm,dd){
   if ((mm == 4 || mm == 6 || mm == 9 || mm == 11) && dd > 30 ) {
      return false;
   }	  
   return true; 
}

function checkLeapMonth(mm,dd,yyyy){
   if (yyyy % 4 > 0 && dd > 28 ) {
      return false;
   }	  
   return true; 
}

function emailCheck1(emailStr) {
// checks if the e-mail address is valid
   var emailPat = /^(\".*\"|[A-Za-z]\w*)@(\[\d{1,3}(\.\d{1,3}){3}]|[A-Za-z]\w*(\.[A-Za-z]\w*)+)$/;
   var matchArray = emailStr.match(emailPat);
   if (matchArray == null) {
      return false;
  }

// make sure the IP address domain is valid
   var IPArray = matchArray[2].match(/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/);
   if (IPArray != null) {
      for (var i=1;i<=4;i++) {
        if (IPArray[i]>255) {
          return false;
        }
      }
   }
return true;
}

function IsAlphaNumeric(sString) {
    var inputStr = sString.toString();
    for (var i = 0; i < inputStr.length; i++) {
       var oneChar = inputStr.charCodeAt(i);
       if (!((oneChar > 47 && oneChar < 58 ) || (oneChar > 96 && oneChar < 123 ) || (oneChar > 64 && oneChar < 91 ) || oneChar == 32)) {
          return false;
        }
    }
	return true;
}

function isZIPCode (s) {  
	if (!isNumber(s)) {
       return false;
	}   
	if (s.length != 5 && s.length != 9) {
       return false;
	}   
    return true;
}
 
function space_replace(sString) {
    var i;
    var str = "";
    var s = sString;
    for (i = 0; i < s.length; i++) {   
        var c = s.charAt(i);
        if ( c == " ") {
           str += "%20";
        } else {
           str += c;
        }
    }
    sString = str;
    return sString;
}
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 represents the range of characters allowed as
   the first character in a valid username or domain.  I just made it
   the same as above, but if you want to add a different constraint,
   you would change it here. */
var firstChars=validChars
/* 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=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents at atom (basically a series of
   non-special characters.) */
var atom="(" + firstChars + validChars + "*" + ")"
/* The following string represents one word in the typical username.
   For example, in john.doe@somewhere.com, john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* 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 course 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. */
//sam	alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
//sam    alert("The username doesn't seem to be valid.")
    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) {
//sam	        alert("Destination IP address is invalid!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
//sam	alert("The domain name doesn't seem to be valid.")
    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).
   If there's a country code at the end of the address, the full domain
   must include a hostname and category (e.g. host.co.uk or host.pub.nl).
   If it ends in a .com or something, make sure there's a hostname.*/

/* 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>3) {
   // the address must end in a two letter or three letter word.
//sam   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

/* If it ends in a country code, we want to make sure there are at
   least 2 atoms preceding it (representing host and category (i.e.
   com, gov, etc.)) */
if (domArr[domArr.length-1].length==2 && len<3) {
//sam   var errStr="This address ends in two characters, which is a country"
//sam   errStr+=" code.  Country codes must be preceded by "
//sam   errStr+="a hostname and category (like com, co, pub, pu, etc.)"
//sam   alert(errStr)
   return false
}

/* If it just ends in .com, .gov, etc., make sure there's a host name.
   This case can never actually happen because earlier checks take
   care of this implicitly, but we'll do it anyway. */
if (domArr[domArr.length-1].length==3 && len<2) {
//sam   var errStr="This address is missing a hostname!"
//sam   alert(errStr)
   return false
}
// If we've gotten this far, everything's valid!
return true;
}
//  End -->