//javascript by Denny Eapen

function CheckFieldEmpty(fieldName,message) {
fieldName.value = trim(fieldName.value)
//msgString=(fieldName.value=='')?msgString+counter+'. ' + message+'\n':msgString;

if (fieldName.value=='')
	SetMessage(message);

SetFieldFocus(fieldName);
}




function CheckEmailValid(fldEmailAddress) {
fldEmailAddress.value = trim(fldEmailAddress.value)
if (fldEmailAddress.value!='')
	{
		if(!emailCheck(fldEmailAddress.value))
			SetFieldFocus(fldEmailAddress);
	}
}




function CompareFields(fieldName1,fieldName2,message) {
fieldName1.value = trim(fieldName1.value)
fieldName2.value = trim(fieldName2.value)

if (fieldName1.value!=''&& fieldName2.value!='')
	{
		if (fieldName1.value != fieldName2.value) 
			{
				SetMessage(message);
				SetFieldFocus(fieldName1);
			}
	}
}




function CheckBoxSelected(fieldName,message) {
if (!fieldName.checked) 
	{
		SetMessage(message);
		SetFieldFocus(fieldName);
	} 

}




function DropDownListSelected(fieldName,optionValue,message) {
if (fieldName.value == optionValue) 
	{
		SetMessage(message);
		SetFieldFocus(fieldName);
	} 

}




function IsFieldPositiveInteger(fieldName,message) {
fieldName.value = trim(fieldName.value)
if (fieldName.value!='')
	{
		var ValidChars = "0123456789";
		var IsResult=true;
		var Char;

		if (fieldName.value == 0) {IsResult = false;}

		for (i = 0; i < fieldName.value.length && IsResult == true; i++) 
			{ 
      				if (ValidChars.indexOf(fieldName.value.charAt(i)) == -1) 
         				IsResult = false;
			}		

		if (IsResult == false)
			{
				SetMessage(message);
				SetFieldFocus(fieldName);
			}
	}
}




function RadioButtonSelected(fieldName,message) {
var IsResult=false;

for (i = 0; i < fieldName.length && IsResult == false; i++)
	{
		if (fieldName[i].checked)
			IsResult = true; 
	}

if (IsResult == false)
	{
		SetMessage(message);
		SetFieldFocus(fieldName);
	}
}




function trim(sString) {
while (sString.substring(0,1) == ' ')
	{
	sString = sString.substring(1, sString.length);
	}

while (sString.substring(sString.length-1, sString.length) == ' ')
	{
	sString = sString.substring(0,sString.length-1);
	}
return sString;
}


function SetMessage(message) {
counter++;
msgString=msgString+counter+'. '+message+'\n';
}


function SetFieldFocus(fieldName) {
if (msgString!='' && focusSet=='N') {fieldName.focus();focusSet='Y';}
}


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. "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. */
	SetMessage('Email Address:'+emailStr + ' does not seem to be valid');
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
	SetMessage('The username in Email Address:' + emailStr + ' does not 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) {
	SetMessage('Destination IP address in Email Address:' + emailStr + ' is invalid');
     		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	SetMessage('The domain name in Email Address:' + emailStr + ' does not 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), 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>4) {
   // the address must end in a two letter or three letter word.
	SetMessage('Email Address:' +emailStr + ' must end in a three or four letter domain, or two letter country');
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
 	SetMessage('Email Address:'+emailStr + ' is missing a hostname');
   return false
}

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