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dhtmlxtree

Hi, team!
My question is: how can I load xmlDoc which one is not in some file
example:
var tree=new dhtmlXTreeObject('content_newsgrid',"100%","100%",0);            tree.setImagePath("../lib/dhtmlxtree/codebase/imgs/csh_bluefolders/");

var xmlDoc;
    if ( document.implementation && document.implementation.createDocument ) {
        try {
            xmlDoc = document.implementation.createDocument('', '', null);
        } catch (e) {}
    }
    if ( !xmlDoc ) {
        xmlDoc = document.createElement('xml');
    }
    var rows = xmlDoc.createElement('tree');
    for ( var i = 0; i < 3; ++i ) {
            var row = xmlDoc.createElement('item');
            row.setAttribute('id', 'ss'+i);
            row.setAttribute('text', 'ss'+i);                
            rows.appendChild(row);
    }

please help me
thank you!
    xmlDoc.appendChild(rows);

Do you have some specific use-case, where you need to construct XML document on client side?
You can use slightly different approach. 

var xml="";
xml+="<tree>"; 
  for ( var i = 0; i < 3; ++i )
          xml="<item text='ss"+i+"' id='ss"+i+"' />";
xml+="</tree>";

tree.loadXMLString(xml);

Thank you
I have already  tried this method, it works good, but i have a problem with some character at several nodes and I have an error "Incorrect XML" (I use encoding="windows-1251")

there is one more approach : use your tree method "insertNewChild"

When using loadXMLString in IE , document always treated as UTF encoded ( limitation of browser ) , so it really can cause issues with windows-1251 encoding. 
As one more solution - loading from JSON can be used ( dhtmlxtree_json.js ) 
        var data={id:0,item:[]};
        for ( var i = 0; i < 3; ++i )
             data.item.push({ id:"ss"+i, text:"ss"+1});
        tree.loadJSONObject(data);

JSON data using the same encoding as the page uses, so it must not cause problems with windows-1251 encoded data.