Thank you fisrt! But howto change font-size for title of accordion? Just like this.
<div class="easyui-accordion" fit="true" border="false">
<div title="Folder1" style="overflow:auto;padding:10px;">
<a href="javascript:openFile(1);" class="easyui-linkbutton" plain="true" iconCls="icon-folder">File1</a>
<a href="javascript:openFile(2);" class="easyui-linkbutton" plain="true" iconCls="icon-folder">File2</a>
<a href="javascript:openFile(3);" class="easyui-linkbutton" plain="true" iconCls="icon-folder">File3</a>
</div>
</div>