function check_form() {
	
	if ( document.contacto.nombre.value == "" ) {
		alert( "You must complete your name." );
		document.contacto.nombre.focus();
		return false;
	}
	if ( document.contacto.apellido.value == "" ) {
		alert( "You must complete your last name." );
		document.contacto.apellido.focus();
		return false;
	}
	
		
	if ( document.contacto.email.value == "" ) {
		alert( "You must complete your E-mail." );
		document.contacto.email.focus();
		return false;
	}
	
	if ( document.contacto.email != "" ) {
		pat=/^[\w\_\.]{2,255}@[\w]{2,255}\.[a-z]{1,3}\.?[a-z]{0,3}$/
		regExp = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if ( !regExp.test( document.contacto.email.value ) ) {
			alert( "Invalid E-mail" );
			document.contacto.email.focus();
			return false;
		}
	}
	
/*	
	if ( document.contacto.pais.value == "" ) {
		alert("Debe indicar país");
		document.contacto.pais.focus();
		return false;
	}
	
	if (document.contacto.pais.value == '200' && document.contacto.region.value == "" ) {
		alert( "Debe indicar region" );
		document.contacto.region.focus();
		return false;
	}
*/	
	if ( document.contacto.preguntas.value == "" ) {
		alert( "You must complete the question or comment." );
		document.contacto.preguntas.focus();
		return false;
	}
	
		
	return true;
}