js conversion object to xml

var XmlHelper=function(){
 var _arrayTypes={}
 var _self=this;
 /*
  *Convert object to xml
  *@obj Target object
  *@rootname Node Name
  *@arraytypes Configure the node name of the sub-element of the array field
  */
 =function(obj,rootname,arraytypes){
 if(arraytypes){
  _arrayTypes=arraytypes;
 }
 var xml="";
 if(typeof obj!=="undefined"){
  if((obj)){
  xml+=parseArrayToXML(obj,rootname);
  }else if(typeof obj==="object"){
  xml+=parseObjectToXML(obj,rootname);
  }else{
  xml+=parseGeneralTypeToXML(obj,rootname);
  }
 }
 return xml;
 }
 var parseObjectToXML=function(obj,rootname){
 if(typeof rootname==="undefined"||!isNaN(Number(rootname))){
  rootname="Object";
 }
 var xml="<"+rootname+">";
 if(obj){
  for(var field in obj){
  var value=obj[field];
  if(typeof value!=="undefined"){
   if((value)){
   xml+=parseArrayToXML(value,field);
   }else if(typeof value==="object"){
   xml+=_self.parseToXML(value,field);
   }else{
   xml+=parseGeneralTypeToXML(value,field);
   }
  }
  }
 }
 xml+="</"+rootname+">";
 return xml;
 }
 var parseArrayToXML=function(array,rootname){
 if(typeof rootname==="undefined"||!isNaN(Number(rootname))){
  rootname="Array";
 }
 var xml="<"+rootname+">";
 if(array){
  var itemrootname=_arrayTypes[rootname];
  (function(item){
  xml+=_self.parseToXML(item,itemrootname);
  });
 }
 xml+="</"+rootname+">";
 return xml;
 }
 var parseGeneralTypeToXML=function(value,rootname){
 if(typeof rootname==="undefined"||!isNaN(Number(rootname))){
  rootname=typeof value;
 }
 var xml="<"+rootname+">"+value+"</"+rootname+">";
 return xml;
 }
}
//=============================================================================================================================var xmlhelper=new XmlHelper();
//Example 1var testobj={
 field1:"1",
 field2:true,
 field3:[{a:1},{a:2}]
 }
((testobj,"testobj",{field3:"ArrayItem"}));
//Output: <testobj><field1>1</field1><field2>true</field2><field3><ArrayItem><a>1</a></ArrayItem><a>2</a></ArrayItem></field3></testobj>("================================================");
//Example 2var testobj2=[1,2,3];
((testobj2,"testobj2"));
//Output:&lt;testobj2&gt;&lt;number&gt;1&lt;/number&gt;&lt;number&gt;2&lt;/number&gt;&lt;number&gt;3&lt;/number&gt;&lt;/testobj2&gt;