<SCRIPT language="javascript" type="text/javascript">

function CheckXMLDom() {

	var dom,serial,parser

	if (window.navigator.appName.toLowerCase().indexOf("microsoft") > -1) {
		dom = new ActiveXObject("Msxml2.DOMDocument.3.0");
		dom.async = false;
	}
	else {
		dom = document.implementation.createDocument("", "", null);
		dom.async = false;
		serial = new XMLSerializer();
		parser = new DOMParser();
	}

	var node = dom.createProcessingInstruction("xml", "version='1.0'");
	dom.appendChild(node);

	strXml = "<" + "?xml version='1.0' ?" + ">";
	strXml += "<mydata>";
	strXml += "</mydata>";

	if (window.navigator.appName.toLowerCase().indexOf("microsoft") > -1) {
		alert(dom.xml);

		dom.loadXML(strXml);

		alert(dom.xml);

	}
	else {
		alert(serial.serializeToString(dom));

		var doc = parser.parseFromString(strXml, "text/xml");

		alert(serial.serializeToString(doc));
	}

}

</SCRIPT>