function open_menu(elem){
	var elem1=document.getElementById(elem);
	var elem1_tbl=document.getElementById(elem+'_tbl');
	if (elem1 && elem1_tbl){
		if (elem1.style.display!="block"){
			elem1.style.display="block";
			elem1_tbl.className="rmenu_s";
			writeCookie(elem, "1", 24*30);
		}
		else {
			elem1.style.display="none";
			elem1_tbl.className="rmenu";
			writeCookie(elem, "0", 24*30);
		}
	}
	else {
		var expdate1=new Date();
		writeCookie(elem, "0", expdate1.getTime());
	}
}