function cr(id) {
	currentElement = document.getElementById(id);
	currentElement.style.display = "none";
	
	id1 = id.substr(0,3);
	id2 = id.substr(3,1);
	
	currentElement = document.getElementById(id1);
	if (id2 == 'p') currentElement.style.display = "block";
	  else currentElement.style.display = "none";
	
	if (id2 == 'p') id2 = 'm';
	   else id2 = 'p';	
	
	id = id1+id2;
	currentElement = document.getElementById(id);
	currentElement.style.display = "block";
	
}