function showBlock(id, idHref){
 	var elHref = document.getElementById(idHref);
 	var element = document.getElementById(id);
 	//
 	if (element.style.display == 'block') {
 		element.style.display = 'none';
 		elHref.className = 'nw-hd'; // pluss
 	} else {
 		element.style.display = 'block';
 		elHref.className = 'nw-hd-act'; // minus
 	}
 }