function valid()
{  
	var val = document.registerfrm	
	if(val.firstname.value=="")
	{
		alert("Please enter first name.\n");
		val.firstname.focus();
		return false;		
	}
	
	
	if(val.lastname.value=="")
	{
		alert("Please enter last name.\n");
		val.lastname.focus();
		return false;		
	}
	
	if(val.homephone.value=="")
	{
		alert("Please enter home phone.\n");
		val.homephone.focus();
		return false;		
	}
	
	if(val.emailid.value=="")
		{
			alert("Please enter email address.\n");
			val.emailid.focus();
			val.emailid.select();			
			return false;			
		}
	
		if(isValidEmail(val.emailid.value)==false)
		{
			
			val.emailid.focus();
			val.emailid.select();			
			return false;			
		}	
}

function isAllCharacters(objValue)
{
		var characters="' -abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."
		var tmp
		var lTag
		lTag = 0
		temp = (objValue.length)
		for (var i=0;i<temp;i++)
		{
			tmp=objValue.substring(i,i+1)
			if (characters.indexOf(tmp)==-1)
			{
				lTag = 1
			}
		}
		if(lTag == 1)
			return false
		else
			return true
}
function isValidEmail(emailStr)
{
		if(emailStr=="")
		{
				//alert("Please enter email id.");
				return false;
				
		}
			/* 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=/^(.+)@(.+)$/
			/* The following string represents the pattern for matching all special
			   characters.  We don't want to allow special characters in the address. 
			   These characters include ( ) < > @ , ; : \ " . [ ]    */
			//var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
			var specialChars="\\(\\)<>@,`';:~!#$%^&*+=|{}?\\\\\\\"\\.\\[\\]"
			
			/* 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. "sg 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. sg@[123.124.233.4] is a legal
			   e-mail address. NOTE: The square brackets are required. */
			var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
			/* The following string represents an atom (basically a series of
			   non-special characters.) */
			var atom=validChars + '+'
			/* The following string represents one word in the typical username.
			   For example, in sg.sg@somewhere.com, sg and sg are words.
			   Basically, a word is either an atom or quoted string. */
			var word="(" + atom + "|" + quotedUser + ")"
			// The following pattern describes the structure of the user
			var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
			/* 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 seem to be invalid(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.")
			    return false
			}

			
			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>5) {
			   // 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
			}

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

			}

			// If we've gotten this far, everything's valid!
			return true;
}
function isValidDate(dateStr) 
{
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1;//January is 0!
var yyyy = today.getFullYear();
//alert(dd);
//alert(mm);
//alert(yyyy);

// Checks for the following valid date formats:
// MM/DD/YY   MM/DD/YYYY   MM-DD-YY   MM-DD-YYYY
// Also separates date into month, day, and year variables

var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{2}|\d{4})$/;

// To require a 4 digit year entry, use this line instead:
// var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{4})$/;

var matchArray = dateStr.match(datePat); // is the format ok?
if (matchArray == null) {
alert("Date is not in a valid format.")
return false;
}

month = matchArray[1]; // parse date into variables
day = matchArray[3];
year = matchArray[4];


if (month < 1 || month > 12) { // check month range
alert("Month must be between 1 and 12.");
return false;
}
if (day < 1 || day > 31) {
alert("Day must be between 1 and 31.");
return false;
}
if ((month==4 || month==6 || month==9 || month==11) && day==31) {
alert("Month "+month+" doesn't have 31 days!")
return false
}
if (month == 2) { // check for february 29th
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day>29 || (day==29 && !isleap)) {
alert("February " + year + " doesn't have " + day + " days!");
return false;
   }
}
return true;  // date is valid
}


function validUrl(url)                                 // Link Tracker : To check whether URL is Valid OR Not
{ 
 // alert(url);
  var i;
  var result=1;
  var urlPart;
  var urlCheck=url;
 
  if(urlCheck.length<5)
	 result=2;

  urlPart=urlCheck.split(":");

  if(urlPart[0]=="http" || urlPart[0]=="https")
	{
	 
	  urlPart=urlPart[1].split(".");
	 if((urlPart[urlPart.length-1].length < 2) || urlPart.length < 2)//|| (urlPart[urlPart.length-2].length < 2)
		  result=2;
      else
		  result=1;
	}
  else
	{
	  result=2;
	}

	if(result==2)
		return false;
	else 
	 {
		return true;
 	 }
 }

function numbersonly(e,a)
{	// var docf=document.frmRegister.d;
	var unicode=e.charCode? e.charCode : e.keyCode
	
	if (unicode!=8)
	{ 
		if (unicode<48||unicode>57) //if not a number
		{
			return false ;//disable key press
		}
	}
}

String.prototype.trim = function() { return this.replace(/^\s+|\s+$/, ''); };