function display(num){

	if(num != 0){
		for(var i=1; i<13; i++) {
			if(i == num){
				if(document.getElementById("notice"+num).style.display == "block"){
					document.getElementById("notice"+num).style.display = "none";
				}else{
					document.getElementById("notice"+num).style.display = "block";
				}
			}else{       
				document.getElementById("notice"+i).style.display = "none";
			}
		}
	}
}