function show_k(element)
{
	if(!element)return false;
	var element_mod_class = element;
	while(element && (element=element.nextSibling) ) if( element.nodeType==1 ) break;
	if(!element || !element.style)return false;
	var eactive = element.style.display!="block";
	element.style.display = eactive ? "block" : "none";
	element_mod_class.className = eactive ? "active" : "";
	return false
}