use easyui demo to explain the issue
the main page : (panel.html)
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Panel - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../js/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="../js/themes/icon.css">
<link rel="stylesheet" type="text/css" href="demo.css">
<script type="text/javascript" src="../js/jquery-1.8.3.js"></script>
<script type="text/javascript" src="../js/jquery.easyui.all.js"></script>
<script>
function open1(){
$('#p').panel('open');
}
function close1(){
$('#p').panel('close');
}
function load1(){
$('#p').panel('refresh','layout.html');
}
</script>
</head>
<body>
<h2>Panel</h2>
<div class="demo-info">
<div class="demo-tip icon-tip"></div>
<div>Click the right top buttons to perform actions with panel.</div>
</div>
<div style="margin:10px 0;">
<a href="#" class="easyui-linkbutton" onclick="open1()">Open</a>
<a href="#" class="easyui-linkbutton" onclick="close1()">Close</a>
<a href="#" class="easyui-linkbutton" onclick="load1()">Load</a>
</div>
<div style="height:300px;background:#fafafa;padding:5px;">
<div id="p" class="easyui-panel" style="padding:10px;"
data-options="title:'My Panel',iconCls:'icon-save',
collapsible:true,minimizable:true,maximizable:true,closable:true">
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
<p>panel</p>
</div>
</div>
</body>
</html>
the load page : use layout.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Border Layout - jQuery EasyUI Demo</title>
</head>
<body class="easyui-layout">
<div data-options="region:'north',border:false" style="height:60px;background:#B3DFDA;padding:10px">north region</div>
<div data-options="region:'west',split:true,title:'West'" style="width:150px;padding:10px;">west content</div>
<div data-options="region:'east',split:true,collapsed:true,title:'East'" style="width:100px;padding:10px;">east region</div>
<div data-options="region:'south',border:false" style="height:50px;background:#A9FACD;padding:10px;">south region</div>
<div data-options="region:'center',title:'Main Title'"></div>
</body>
</html>
Use IE8,9,ff17 get the same result