/*function checkIfEmailValid(emailId)
{
	if (emailId.search("@") < 1) 
	{	
		return false;
	}	
	indexOfAt = emailId.indexOf("@")+1;
	indexOfTerminator = emailId.lastIndexOf(".");	
	if(indexOfTerminator < indexOfAt)
	{
		return false;
	}
	
	if (emailId.length == (indexOfTerminator+1))
	{	
		return false;
	}
	if(emailId=="" || !emailId.length>0)
	{		
		return false;
	}
	
	return true;
}*/


function checkIfEmailValid (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. */
	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
    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) {
	        alert("Destination IP address is invalid!")
		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. Please enter again.")
    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>3) {
   // the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}


if (len<2) {
   var errStr="This address is missing a hostname!  Please enter again."
   alert(errStr)
   return false
}

return true;
}




function compareDates(value1, value2)
 {
	//0 if the dates are same 
	//-1 if the first one is an earlier date 
	//1 if the first one is a later date 

   var date1, date2;
   var month1, month2;
   var year1, year2;

   month1 = value1.substring (0, value1.indexOf ("-"));
   date1 = value1.substring (value1.indexOf ("-")+1, value1.lastIndexOf ("-"));
   year1 = value1.substring (value1.lastIndexOf ("-")+1, value1.length);

   month2 = value2.substring (0, value2.indexOf ("-"));
   date2 = value2.substring (value2.indexOf ("-")+1, value2.lastIndexOf ("-"));
   year2 = value2.substring (value2.lastIndexOf ("-")+1, value2.length);


   if (parseInt(year1) > parseInt(year2)) return 1;
   else if (parseInt(year1) < parseInt(year2)) return -1;
   else if (parseInt(month1) > parseInt(month2)) return 1;
   else if (parseInt(month1) < parseInt(month2)) return -1;
   else if (parseInt(date1) > parseInt(date2)) return 1;
   else if (parseInt(date1) < parseInt(date2)) return -1;
   else return 0;
   
   
} 


/*function compareDates1 (value1, value2)
 {
	//0 if the dates are same 
	//-1 if the first one is an earlier date 
	//1 if the first one is a later date 

   var date1, date2;
   var month1, month2;
   var year1, year2;

   month1 = value1.substring (0, value1.indexOf ("-"));
   date1 = value1.substring (value1.indexOf ("-")+1, value1.lastIndexOf ("-"));
   year1 = value1.substring (value1.lastIndexOf ("-")+1, value1.length);

   month2 = value2.substring (0, value2.indexOf ("-"));
   date2 = value2.substring (value2.indexOf ("-")+1, value2.lastIndexOf ("-"));
   year2 = value2.substring (value2.lastIndexOf ("-")+1, value2.length);

   if (year1 > year2) return 1;
   else if (year1 < year2) return -1;
   else if (month1 > month2) return 1;
   else if (month1 < month2) return -1;
   else if (date1 > date2) return 1;
   else if (date1 < date2) return -1;
   else return 0;
}*/
/*function compareDates4(value1, value2)
 {
	//0 if the dates are same 
	//-1 if the first one is an earlier date 
	//1 if the first one is a later date 

   var date1, date2;
   var month1, month2;
   var year1, year2;
   month1 = value1.substring (0, value1.indexOf ("-"));
   date1 = value1.substring (value1.indexOf ("-")+1, value1.lastIndexOf ("-"));
   year1 = value1.substring (value1.lastIndexOf ("-")+1, value1.length);
   month2 = value2.substring (0, value2.indexOf ("-"));
   date2 = value2.substring (value2.indexOf ("-")+1, value2.lastIndexOf ("-"));
   year2 = value2.substring (value2.lastIndexOf ("-")+1, value2.length);
   if (year1 > year2) 
   {
	return 1;
   }
   else if (year1 < year2) 
   {
	return -1;
   }
   else if (year1==year2)
   {
    if (month1 > month2) 
	{
		return 1;
	}
    else if (month1 < month2) 
	{
		return -1; 
	}
    else if (month1==month2)
	{
	   if (date1 > date2) 
	   {
		return 1;
	   }
	  else if (date1 < date2) 
	   {
		return -1;
	   }
	   else if (date1==date2)
	   {
		return 0;
	   }
	}
   }
   
} */