function CheckForm( theform ) 
{	var bMissingFields = false;
	var strFields = "";	

	if( theform.Nombre.value == '' ) {
	   bMissingFields = true;
	   strFields += "     Nombre\n";}; 
	if( theform.email.value == '' ){
	   bMissingFields = true;	
	   strFields += "     Email\n";};
	if( theform.Comentario.value == '' ){
	   bMissingFields = true;	
	   strFields += "     Comentario\n";};

	
	if( bMissingFields ) {	
	    alert( "Por favor llene los campos requeridos:\n" + strFields );
	    return false;
	}

	return true;
};