function shn_showtool(id) {
		var elm = document.getElementById(id)
		elm.style.display = "block"
	}
	
	
	function shn_hidetool(id) {
		var elm = document.getElementById(id)
		elm.style.display = "none"
	}
	function shn_hide_all(){
		var cnt_div = 1;
		while (cnt_div < 12){
			var elmname = "schedule_" + cnt_div;
			cnt_div++;
			document.getElementById(elmname).style.display = "none"
		}

	}