art.dialog.open()方法属扩展方法,
你必须在加载<script type="text/javascript" src="../js/common/artDialog.js?skins=chrome"></script>之后,
加载:artdialog/plugins/iframeTools.js ,即<script type="text/javascript" src="../js/common/plugins/iframeTools.js"></script>
注意:是在artdialog的js后面加载!!!