在Ext引用页面中加入红色部分的空白占位图标即可解决此问题。
<link rel="stylesheet" type="text/css" href="scripts/ext-2.1/resources/css/ext-all.css"/>
<script src="scripts/common.js" type="text/javascript"></script>
<script type="text/javascript" src="scripts/ext-2.1/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="scripts/ext-2.1/ext-all.js"></script>
<script type="text/javascript" src="scripts/ext-2.1/source/locale/ext-lang-zh_CN.js" charset="gb2312"></script>
[color=red]
<script type="text/javascript">Ext.BLANK_IMAGE_URL = 'scripts/ext-2.1/resources/images/default/tree/s.gif';</script>[/color]
<link rel="stylesheet" type="text/css" href="scripts/ext-2.1/resources/css/ext-all.css"/>
<script src="scripts/common.js" type="text/javascript"></script>
<script type="text/javascript" src="scripts/ext-2.1/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="scripts/ext-2.1/ext-all.js"></script>
<script type="text/javascript" src="scripts/ext-2.1/source/locale/ext-lang-zh_CN.js" charset="gb2312"></script>
[color=red]
<script type="text/javascript">Ext.BLANK_IMAGE_URL = 'scripts/ext-2.1/resources/images/default/tree/s.gif';</script>[/color]