copy remote store to local store

[shruti_nair]

hi I want to copy my remote store into a local store
my code
remote store

LoginForm.music_store = new Ext.data.TreeStore({
    model: 'ListItem',
proxy:
    {
    
        type:'scripttag',
         url: 'http://expensetrackingapplication.com/cocacola/webservices/receipts.php',
         reader: {
            type: 'tree',
            root: 'items'
         },
         afterRequest:function(){
             
                 alert("inside listener");
            this.each(function(record)
                {
                     LoginForm.LocalReceiptStore.insert(record.data);
                });
            LoginForm.LocalReceiptStore.sync();
         }
    }

});

local store

LoginForm.LocalReceiptStore = new Ext.data.TreeStore({
    model: 'ListItem',
    proxy: {
        type: 'localstorage',
        id: 's',
        reader: {
            type: 'tree',
            root: 'items'
         }
    },
    

});

this gives a error
TypeError: 'undefined' is not a function (evaluating 'this.each(function(record)
{

LoginForm.LocalReceiptStore.insert(record.data);
})')

[shruti_nair]

Both are treestore .can i copy a treestore into another??

because treestore doesnt use .each