var ntf_msg_list =  new Array();
	var ntf_max_msg_line = 5;
	function ntf_init(){
		var divNotify=document.createElement("div");
		var typ=document.createAttribute("class");
		
		typ.nodeValue="pcd_notify";
		divNotify.attributes.setNamedItem(typ);

		var typId=document.createAttribute("id");
		typId.nodeValue="id_pcd_notify";
		divNotify.attributes.setNamedItem(typId);

		var body=document.getElementsByTagName("body")[0];
		body.appendChild(divNotify);
		divNotify.style.display="none";
		
	}

	function ntf_show(msg,timeout=8){
		if(ntf_msg_list.length < ntf_max_msg_line){
			ntf_msg_list.push(msg);
		}
		else{
			for(let i=1 ; i < ntf_msg_list.length; i++){
				ntf_msg_list[i-1] = ntf_msg_list[i];
			}
			ntf_msg_list[ntf_msg_list.length-1] = msg;
		}
		let divNotify=document.getElementById("id_pcd_notify");
		if(divNotify){
			let strHtml = "";
			for(const strMsg of ntf_msg_list){
				strHtml += "<div class='ntf_msg_div'>";
				strHtml += strMsg;
				strHtml += "</div>";
			}
			divNotify.innerHTML = strHtml;
			divNotify.style.display = "block";
			setTimeout("ntf_hide()",timeout*1000);
		}
	}
	function ntf_hide(){
	document.getElementById('id_pcd_notify').style.display='none';
	}