migrating dojo0.3 Tree to DOJO1.0.1 dijit tree

Hi Alex,

Present i am using dojo0.3 to display tree structure which will get data from servlet that will return jsonobjects.
now i need to migrate tree structure to dojo1.0.1 dijit tree.
can u help me out how to send the request to servlet and get the jsonobjects as a response
i tried the following code to get data from servlet.i am not able to place the data in Tree structure.

Dijit Tree Test

Tree with hardcoded root node (not corresponding to any item in the store)

if(item){
alert("Execute of node " + continentStore.getLabel(item)
+", population=" + continentStore.getValue(item, "population"));
}else{
alert("Execute on root node");
}

return "noteIcon";

output will be like this from server===>

{"label":"name","items":[{"label":"2200","name":"2200"}],"identifier":"name"}

please help me out to place the data.....

Thanks in advance

sorry here is the source code

Dijit Tree Test

Tree with hardcoded root node (not corresponding to any item in the store)