ECMAScript 之 获取 peoplePickerData 的ID 值 找了很久 请支持奥

<script type="text/javascript">
  function getXmlValue(xmlDocument, xpath) {
	var results = null;

	if (xmlDocument.evaluate) {
		results = xmlDocument.evaluate("/ArrayOfDictionaryEntry/DictionaryEntry[./Key = 'SPUserID']/Value", xmlDocument, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
		if (results.snapshotLength > 0) {
			return results.snapshotItem(0).textContent;
		}
	} else {
		results = xmlDocument.selectSingleNode(xpath);
		if (results != null) {
			return results.text;
		}
	}
	return null;
}
function getPeoplePickerDataDocument() {
   // alert($("[id$='txt_Name']").attr("id"));
   	       // var peoplePickerElement = document.getElementById('ctl00_m_g_f1062bbd_2a06_4cd8_8b12_eb31759d7693_txt_Name'),
      var peoplePickerElement =document.getElementById($("span[id$='_txt_Name']").attr("id")),
		peoplePickerDivs = peoplePickerElement.getElementsByTagName('div'),
		i,
		length = peoplePickerDivs.length,
		dataDiv = null,
		parser = null,
		dataDoc = null;
	for (i = 0; i < length; i = i + 1) {
		if (peoplePickerDivs[i].id != null) {
			if (peoplePickerDivs[i].id == 'divEntityData') {
				entityDataDiv = peoplePickerDivs[i];
				dataDiv = entityDataDiv.getElementsByTagName('div')[0];

				if (window.DOMParser) {
					parser = new DOMParser();
					dataDoc = parser.parseFromString(dataDiv.attributes["data"].value, "text/xml");
				} else {
					dataDoc = new ActiveXObject("Microsoft.XMLDOM");
					dataDoc.async = "false";
					dataDoc.loadXML(dataDiv.attributes["data"].value); 
				}
				return dataDoc;
			}
		}
	}
	return null;
}
</script>

var Name=$("div[id$='_txt_Name_upLevelDiv']").text();
         var peoplePickerData = getPeoplePickerDataDocument();
         var userId = getXmlValue(peoplePickerData, "/ArrayOfDictionaryEntry/DictionaryEntry[./Key = 'SPUserID']/Value"); 

peoplePickerData