function activagrup(str) {


	if (document.forms[0].adhesio[0].checked) {

		document.getElementById('personal').style.visibility = "visible";
        	document.forms[0].getElementById('cognoms').disabled = false; 
			

	}

	if (document.forms[0].adhesio[1].checked) {

		document.getElementById('personal').style.visibility = "hidden";
        	document.forms[0].getElementById('cognoms').disabled = true; 

	}


}


var W3CDOM = (document.getElementsByTagName && document.createElement);

window.onload = function () {

	document.forms[0].onsubmit = function () {
		return validate()
	}
}

// Validate form
function validate() {
	validForm = true;
	firstError = null;
	errorstring = '';

	var dades = document.forms[0];
	var x = document.forms[0].elements;
	


	var blanc = /^[\s+]*$/;

	if (!x['nom'].value || blanc.test(x['nom'].value)) {
		writeError(x['nom'],'Ompliu aquest camp'); 
	}
	if ((!x['cognoms'].value || blanc.test(x['cognoms'].value)) && x['adhesio'][0].checked ) { 
		writeError(x['cognoms'],'Ompliu aquest camp');
	}
	if ((!x['ID'].value || blanc.test(x['ID'].value)) && x['adhesio'][0].checked) {
		writeError(x['ID'],'Ompliu aquest camp');
	}

	if (!x['email'].value || blanc.test(x['email'].value)) {
		writeError(x['email'],'Ompliu aquest camp');
	}

	if (!x['poblacio'].value || blanc.test(x['poblacio'].value)) {
		writeError(x['poblacio'],'Ompliu aquest camp');
	}

	if (emailCheck(x['email'].value) == false) {
		writeError(x['email'],'L`adreça electrònica no és vàlida');
	}	
	
	if (!W3CDOM) {
		alert(errorstring);
	}
	if (firstError) {
		firstError.focus();
	}
	if (validForm) {
		dades.submit();
	}
	return false;
}

function writeError(obj,message) {
	validForm = false;
	if (obj.hasError) return;
	if (W3CDOM) {
		obj.className += ' error';
		obj.onchange = removeError;
		var sp = document.createElement('span');
		sp.className = 'error';
		sp.appendChild(document.createTextNode(message));
		obj.parentNode.appendChild(sp);
		obj.hasError = sp;
	}
	else {
		errorstring += obj.name + ': ' + message + '\n';
		obj.hasError = true;
	}
	if (!firstError)
		firstError = obj;
}

function removeError()
{
	this.className = this.className.substring(0,this.className.lastIndexOf(' '));
	this.parentNode.removeChild(this.hasError);
	this.hasError = null;
	this.onchange = null;
}


//Check email
function emailCheck (emailStr) {

/* The following variable tells the rest of the function whether or not
to verify that the address ends in a two-letter country or well-known
TLD.  1 means check it, 0 means don't. */

var checkTLD=1;

/* The following is the list of known TLDs that an e-mail address must end with. */

var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|cat)$/;

/* 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. */

return false;
}
var user=matchArray[1];
var domain=matchArray[2];

// Start by checking that only basic ASCII characters are in the strings (0-127).

for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
return false;
   }
}

// See if "user" is valid 

if (user.match(userPat)==null) {

// user is not 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) {
return false;
   }
}
return true;
}

// Domain is symbolic name.  Check if it's valid.
 
var atomPat=new RegExp("^" + atom + "$");
var domArr=domain.split(".");
var len=domArr.length;
for (i=0;i<len;i++) {
if (domArr[i].search(atomPat)==-1) {
return false;
   }
}

/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
return false;
}

// Make sure there's a host name preceding the domain.

if (len<2) {
return false;
}

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


function nif(nifvalue)
{

dni=nifvalue.substring(0,nifvalue.length-1)
let=nifvalue.charAt(nifvalue.length-1)
if (!isNaN(let))
 {
  return false
 }
else
 {
  cadena="TRWAGMYFPDXBNJZSQVHLCKET"
  posicion = dni % 23
  letra = cadena.substring(posicion,posicion+1)
  if (letra!=let.toUpperCase())
   {
    return false
   }
 }
}

function cnc(cncvalue)
{

var cncpat = /^\d{6}$/;
var match_cnc=cncvalue.match(cncpat);

if (match_cnc==null)
 {
  return false;
 }
else {return true;}
}

function cdi(cdivalue)
{

var cdipat = /^\w{2}\d{7}$/;
var match_cdi=cdivalue.match(cdipat);

if (match_cdi==null)
 {
  return false;
 }
else {return true;}
}