	<!-- This script and many more are available free online at -->
	<!-- The JavaScript Source!! http://javascript.internet.com -->
		
	<!-- Changes:  Sandeep V. Tamhankar (stamhankar@hotmail.com) -->
	
	/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
				(the bug is actually in the weak regexp engine of the browser; I
				simplified the regexps to make it work).
	   1.1.1: Removed restriction that countries must be preceded by a domain,
				so abc@host.uk is now legal.  However, there's still the 
				restriction that an address must end in a two or three letter
				word.
		 1.1: Rewrote most of the function to conform more closely to RFC 822.
		 1.0: Original  */
	
	<!-- Begin
	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. */
		   
		/*Is er wel een e-amil adres opgegeven?*/
		if(emailStr.length < 1){
			alert("Geef een e-mailadres op!")
			return false			
		}
		/* 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("Het E-mailadres lijkt onjuist (check @ en .)")
			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("De gebruikersnaam lijkt onjuist")
			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("Uw IP-adres is ongeldig!")
				return false
				}
			}
			return true
		}
	
		// Domain is symbolic name
		var domainArray=domain.match(domainPat)
		if (domainArray==null) {
			alert("De domeinnaam is niet juist.")
			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("Het adres moet eindigen met een drieletterige domeinnaam, of een tweeletterige landencode.")
		   return false
		}
	
		// Make sure there's a host name preceding the domain.
		if (len<2) {
		   var errStr="Er is geen hostnaam!"
		   alert(errStr)
		   return false
		}
		
		// If we've gotten this far, everything's valid!
		return true;
	}
	
   function Popup() {
	 window.open("nieuwsbrief-privacy.php", "Privacy",  
	 "resizable='no',HEIGHT=470,WIDTH=400");
   }