function valida(theForm){
	if (theForm.canal.value == "" ){
				alert(texto('18'));
				theForm.canal.focus();
				return (false);
	}
	
	if (theForm.tipo.value == "" ){
				alert(texto('19'));
				theForm.tipo.focus();
				return (false);
	}
	
	if (theForm.topico.value == "" ){
				alert(texto('20'));
				theForm.topico.focus();
				return (false);
	}
	
	if (theForm.textoExtra!=undefined){
		if (theForm.textoExtra.value == "" ){
					alert(texto('21'));
					theForm.textoExtra.focus();
					theForm.textoExtra.select();
					return (false);
		}
	}
	
	if (theForm.nombre.value == "" ){
				alert(texto('7'));
				theForm.nombre.focus();
				theForm.nombre.select();
				return (false);
	}
	if (theForm.apellido.value == "" ){
				alert(texto('8'));
				theForm.apellido.focus();
				theForm.apellido.select();
				return (false);
	}
	if (!valMail(theForm.email)){
				alert(texto('1'));
				theForm.email.focus();
				theForm.email.select();
				return (false);
	}
	if (theForm.contenido.value == ""){
			alert(texto('22'));
			theForm.contenido.focus();
			theForm.contenido.select();
			return (false);
	}
	if (theForm.contenido.value.lenght > 3000){
			alert(texto('23'));
			theForm.contenido.focus();
			theForm.contenido.select();
			return (false);
	}
	theForm.contenido.value=theForm.contenido.value.replace(/'/gi,"´");
	theForm.op.value=1;
	theForm.submit();    
	return (true);   	   
}