获取一个系统中的可用的最新版本的DomDocument对象

<mce:script type="text/javascript"><!-- function createDomDoc() { var signatures = ["Msxml2.DOMDocument.6.0", "Msxml2.DOMDocument.5.0", "Msxml2.DOMDocument.4.0", "Msxml2.DOMDocument.3.0", "Msxml2.DOMDocument", "Microsoft.XmlDom"]; for (var i = 0; i < signatures.length; i++) { try { var domDoc = new ActiveXObject(signatures[i]); return domDoc; } catch (e) { } return null; } } // --></mce:script>