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)$/;
	
	/* 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("Direccion Email parece incorrecta (verifique la @ y .'s)");
	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) {
	alert("El nombre de usuario en el Email contiene caracteres invalidos.");
	return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
	if (domain.charCodeAt(i)>127) {
	alert("El nombre de dominio en el Email contiene caracteres invalidos.");
	return false;
	   }
	}
	
	// See if "user" is valid 
	
	if (user.match(userPat)==null) {
	// user is not valid
	alert("El nombre del usuario no es valido.");
	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("La IP destino es invalida!");
	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) {
	alert("El nombre de dominio no es valido.");
	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) {
	alert("La direccion de Email debe terminar en un dominio conocido o las dos letras del pais");
	return false;
	}
	
	// Make sure there's a host name preceding the domain.
	if (len<2) {
	alert("A la direccion de Email le falta el nombre del host.");
	return false;
	}
	// If we've gotten this far, everything's valid!
	return true;
}


function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function doOutlineOnly(targetId) {
  var targetElement;
  targetElement = document.getElementById(targetId);
     if (targetElement.style.display == "none") {
        targetElement.style.display = "";
     } else {
        targetElement.style.display = "none";
	}
}

function showOnly(targetId) {
  var targetElement;
  targetElement = document.getElementById(targetId);
	alert(targetElement);
  targetElement.style.display = "";
	}


function hideOnly(targetId) {
  var targetElement;
  targetElement = document.getElementById(targetId);
	alert(targetElement.style.display);
  targetElement.style.display = "none";
}

function fotoAmpliada(foto, id_medio) {
		window.open("foto_ampliada.asp?id_medio=" +  id_medio + "&foto=" + foto,"fotoAmpliada","width=504,height=410,scrollbars=no,resizable=no");
}

function audioVentana(audio_link) {
		window.open(audio_link,"audioVentana","width=200,height=121,scrollbars=no,resizable=no");
}

function envie_a_un_amigo(id, titulo, prefijoMedio) {
		window.open('envie_a_un_amigo.asp?prefijoMedio=' + prefijoMedio + '&id_noticia=' + id + '&titulo=' + titulo,"EnviaAmigo","width=504,height=410,scrollbars=auto,resizable=auto");
}

function le_sirvio(id, titulo, prefijoMedio) {
		window.open('le_sirvio.asp?prefijoMedio=' + prefijoMedio + '&id_noticia=' + id + '&titulo=' + titulo,"LeSirvio","width=504,height=410,scrollbars=auto,resizable=auto");
}


function cambiarTitulo(nuevoTitulo) {	
	document.getElementById("tituloSeccion").innerHTML = nuevoTitulo;
}


function validaUserForm(objForm) {
	var msg = "";
	if ((objForm.elements.nombre.value == null) || (objForm.elements.nombre.value == "")) {
		msg += "Nombre es obligatorio\n";
	}
	if ((objForm.elements.apellidos.value == null) || (objForm.elements.apellidos.value == "")) {
		msg += "Apellidos es obligatorio\n";
	}
	if ((objForm.elements.pseudonimo.value == null) || (objForm.elements.pseudonimo.value == "")) {
		msg += "Pseudonimo es obligatorio\n";
	}
	if ((objForm.elements.provincia.value == null) || (objForm.elements.provincia.value == "")) {
		msg += "Provincia es obligatorio\n";
	}
	if ((objForm.elements.pais.value != 59) && (objForm.elements.provincia.value != 00)) {
		msg += "Eliga Otra en el campo provincia si su Pais de Residencia no es Ecuador\n";
	}
	var correovalido = emailCheck (objForm.elements.email.value);
	if ((objForm.elements.email.value == null) || (objForm.elements.email.value == "") || (correovalido==false)) {
		msg += "Correo electrónico es obligatorio\n";
	}
	if ((objForm.elements.password.value == null) || (objForm.elements.password.value == "")) {
		msg += "Contraseña es obligatoria\n";
	}
	else{
		if (objForm.elements.password.value.length < 8){
			msg += "La contraseña debe ser de al menos 8 caracteres\n";
		}
	}
	if ((objForm.elements.confpassword.value == null) || (objForm.elements.confpassword.value == "")) {
		msg += "La confirmacion de la Contraseña es obligatoria\n";
	}
	if (msg == "") {
		if (objForm.elements.password.value != objForm.elements.confpassword.value) {
			msg += "La contraseña y su confirmación no coinciden\n";
		}
	}
	if (msg != "") {
		alert(msg);
	} else {
		objForm.submit();
	}
}

function validaComentario(objForm) {
	var msg = "";
	//if ((objForm.elements.comentarista.value == null) || (objForm.elements.comentarista.value == "")) {
		//msg += "Tu Nombre es obligatorio\n";
	//}
	//if ((objForm.elements.url.value == null) || (objForm.elements.url.value == "")) {
		//msg += "url es obligatorio\n";
	//}
	if ((objForm.elements.comentario.value == null) || (objForm.elements.comentario.value == "")) {
		msg += "El comentario es obligatorio\n";
	}
	//var correovalido = emailCheck (objForm.elements.correo.value);
	//if ((objForm.elements.correo.value == null) || (objForm.elements.correo.value == "") || (correovalido==false)) {
		//msg += "Correo electrónico es obligatorio\n";
	//}
	if (msg != "") {
		alert(msg);
	} else {
		objForm.submit();
	}
}