function validar(){
/*
	Función específica para el form actual.
	Valida campos vacíos y notifica con un nombre
	customizado para cada campo.
	El campo email tiene una validación completa.
*/



	//inicializo la variable en donde cargaré los errores
	var errors="";	
	form=document.forms[0];
	//-----------------------------------------------
	

	
	

	/*	
	//-------------------------------------
	if(form.from_nom.value==""){
		errors+="Contact Name\n";
	}
	//-------------------------------------
	*/
	
	//--[ valido mail ]--------------------------------
	if(!emailCheck(form.from_mail.value)){
		//error de mail FROM
		errors+="\n---------------------------\nCorreo electrónico: " + mailErrors;
	}
	//-------------------------------------------------
	


	//-----------------------------------------------




	if(errors!=""){
		//seteo el mensaje de validación
		var errorMsg="Para enviar el formulario debe completar los siguientes campos: \n\n";
	
		//concateno el mensaje con los nombres de los campos erróneos
		errors=errorMsg + errors;
		
		//muestro el mensaje de error
		alert(errors);
		
		//evito que se envíe el form
		return false;
	} else {
	
		//submito el form
		return true;
	}

	

}



//-----------------------------------------------------------

function emailCheck (emailStr) {
/*
	Función de validación de Emails
*/

	//limpio la var que uso para devolver los errores
	mailErrors="";


/* 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)$/;
var knownDomsPat=/^(.*)$/;

/* 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. */

	mailErrors+="La dirección de correo parece incorrecta. Revise la inclusión del caracter @ y . \n";
	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) {
mailErrors+="El nombre de la cuenta de correo contiene errores. \n";
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
mailErrors+="El dominio de la cuenta de correo contiene caracteres no válidos. \n";
return false;
   }
}

// See if "user" is valid 

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

// user is not valid

mailErrors+="El nombre de usuario no es válido.\n";
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) {
mailErrors+="La dirección IP de destino no es válida! \n";
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) {
mailErrors+="El nombre del dominio no es válido \n";
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) {
mailErrors+="La terminación del dominio no es reconocida como válida.\n";
return false;
}

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

if (len<2) {
mailErrors+="Debe agregar el nombre de host!\n";
return false;
}

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