IE7弹出MSXML 5.0支持的问题

IE7显示支持在之前贴过一篇贴子，见这里

当你使用Plone的电脑安装了Office 2003后，用IE7打开Plone站点，IE7弹出提示“未验证的MSXML 5.0” 。见这里

这个问题在当前的Plone2.1, 2.5 版本中都有出现，早期的版本应该也有。这是因为Plone需依赖一个叫做Sarissa外部扩展库，它在IE7中检查本地执行的XmlHttpRequest对象，而IE7 在MSXML5.0中拒绝执行XmlHttpRequest对象。所以本地安装 MSXML 5.0 （Office 2003安装了它）后，就会在IE7中弹出“未验证的MSXML 5.0”。

 _SARISSA_XMLHTTP_PROGID = pickRecentProgID(["Msxml2.XMLHTTP.5.0","Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"], [["XMLHTTP", 4]]);
 _SARISSA_THREADEDDOM_PROGID = pickRecentProgID(["MSXML2.FreeThreadedDOMDocument.5.0","MSXML2.FreeThreadedDOMDocument.4.0", "MSXML2.FreeThreadedDOMDocument.3.0"]);
 _SARISSA_XSLTEMPLATE_PROGID = pickRecentProgID(["Msxml2.XSLTemplate.5.0","Msxml2.XSLTemplate.4.0", "MSXML2.XSLTemplate.3.0"], [["XSLTPROC", 2]]);

 _SARISSA_XMLHTTP_PROGID = pickRecentProgID(["Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"], [["XMLHTTP", 4]]);
 _SARISSA_THREADEDDOM_PROGID = pickRecentProgID(["MSXML2.FreeThreadedDOMDocument.4.0", "MSXML2.FreeThreadedDOMDocument.3.0"]);
 _SARISSA_XSLTEMPLATE_PROGID = pickRecentProgID(["Msxml2.XSLTemplate.4.0", "MSXML2.XSLTemplate.3.0"], [["XSLTPROC", 2]]);