js对话框5秒自动消失

使用了easyui的对话框控件

<html>
  <head>
    <title>5秒后关闭对话框</title>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
	<link rel="stylesheet" type="text/css" href="easyui/themes/default/easyui.css">
	<link rel="stylesheet" type="text/css" href="easyui/themes/icon.css">
	<link rel="stylesheet" type="text/css" href="easyui/demo.css">
	<script type="text/javascript" src="easyui/jquery.min.js"></script>
	<script type="text/javascript" src="easyui/jquery.easyui.min.js"></script>
    <script type="text/javascript" src="javascripts/chat.js"></script>

    <script type="text/javascript">
		$(document).ready(function() {
		 $('#dlg').dialog('close');
		  var mTime = 5;
		  var time;

		  $("#openDlg").click(function(){
			mTime=5;
		  document.getElementById("license").innerText=license;
		  document.getElementById("kind").innerText=kind;
		  document.getElementById("operator").innerText=operator;
		  document.getElementById("mTime").innerText=mTime;
		  $('#dlg').dialog('open');
		  var interval=setInterval(function(){
			 var dialog = $("#dlg").parent().is(":hidden");
			 if (!dialog){
				 if (mTime>1){
					mTime=mTime-1;
					 document.getElementById("mTime").innerText=mTime;
				 }
				 else{
					 $('#dlg').dialog('close');
					 clearInterval(interval);

				 }
			 }
			},1000);

		 }
	});
    </script>
  </head>
  <body>
    <a href="javascript:void(0)" class="easyui-linkbutton" id ="openDlg">打开对话框</a>
    <div id="dlg" class="easyui-dialog" style="width:400px;height:200px;padding:10px" data-options="buttons: [{text:'确认',iconCls:'icon-ok',handler:function(){alert('ok');}},{text:'取消',handler:function(){alert('cancel');;}}]">
    <label id="mTime"></label>秒后自动确认。
    </div>
  </body>
</html>