js生成xml文件

（一）IE浏览器：

var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");

//创建两条处理指令
var newPI=xmlDoc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"utf-8\"");
xmlDoc.appendChild(newPI);
//创建根元素
var documentElement=xmlDoc.createElement("req");
xmlDoc.appendChild(documentElement);
//创建CDATA
//var newCD=xmlDoc.createCDATASection("This is a CDATASection node");
//xmlDoc.documentElement.appendChild(newCD);

//创建元素invoice,其子元素customer，再为customer加上属性，
var chatRoom=xmlDoc.createElement("chatRoom");
var id=xmlDoc.createElement("id");
var cname=xmlDoc.createElement("cname");
var ctype=xmlDoc.createElement("ctype");
var maxUsers=xmlDoc.createElement("maxUsers");
var welcomes=xmlDoc.createElement("welcomes");
var description=xmlDoc.createElement("description");
var status=xmlDoc.createElement("status");
var startTime=xmlDoc.createElement("startTime");
var closeTime=xmlDoc.createElement("closeTime");
var createTime=xmlDoc.createElement("createTime");

chatRoom.appendChild(id);
chatRoom.appendChild(cname);
chatRoom.appendChild(ctype);
chatRoom.appendChild(maxUsers);
chatRoom.appendChild(welcomes);
chatRoom.appendChild(description);
chatRoom.appendChild(status);
chatRoom.appendChild(startTime);
chatRoom.appendChild(closeTime);
chatRoom.appendChild(createTime);

//创建text节点，作为id元素的内容
var idtext=xmlDoc.createTextNode('wwww');
var nametext=xmlDoc.createTextNode('ddddd');
var welcomestext=xmlDoc.createTextNode('ssss');
var descriptiontext=xmlDoc.createTextNode('qqqq');
var startTimetext=xmlDoc.createTextNode('tttt');
var closeTimetext=xmlDoc.createTextNode('rrrrrr');

id.appendChild(idtext);
cname.appendChild(nametext);
ctype.appendChild(xmlDoc.createTextNode("1"));
maxUsers.appendChild(xmlDoc.createTextNode("500"));
welcomes.appendChild(welcomestext);
description.appendChild(descriptiontext);

status.appendChild(xmlDoc.createTextNode("1"));
createTime.appendChild(xmlDoc.createTextNode(new Date()));
startTime.appendChild(startTimetext);
closeTime.appendChild(closeTimetext);

xmlDoc.documentElement.appendChild(chatRoom);
alert(xmlDoc.xml);