function show_div(id_cur, id_lnk){
	var div_set=null;
	div_set=document.getElementById(id_cur);
	if (div_set!=null) {
		if (div_set.style.display=="block") div_set.style.display="none";
		else div_set.style.display="block";
	}
	var lnk_set=null;
	lnk_set=document.getElementById(id_lnk);
	if (lnk_set!=null) {
		if (lnk_set.style.fontWeight=="bold") lnk_set.style.fontWeight="normal";
		else lnk_set.style.fontWeight="bold";
	}
}