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Sending Serialized treegrid through Dataprocessor and retreiving on server side

I am using TreeGrid control in my application, currently i am using Dataprocessor to send changed objects to my java servlet.
I wish to serialize the miodified gridtree, i know how the serialize command works, but i wish to know in which variable would
the serialized object be stored as on the serverside, how i assiociate the serialized XML string with a data object name on the server side
I am just enclosing some code snippet

function sendData(){
//submit serialized gridtree
mygrid.submitSerialization(true);
mygrid.enableMathSerialization(true)
var myXmlStr = mygrid.serialize();
db.sendData();
location.href="<%="/Banking/ProcessServlet %>";
}
<!-- HTML code----->


<script>
//init menu
db.enableDataNames(true);
db.setUpdateMode("off");
db.setTransactionMode("POST");
db.init(mygrid);    
//code snippet
var mygrid = new dhtmlXGridObject('gridbox');
var db = new dataProcessor("<%="/Banking/ProcessServlet %>");
</script>    

You can store serialized grid in the global user data. Please find more information here http://dhtmlx.com/dhxdocs/doku.php?id=dhtmlxgrid:storing_additional_data#userdata

>>mygrid.submitSerialization(true);

If you are using form integration, serialized state of the grid, will be sent with the form as 
$_POST["gridbox_serialized"]

where "gridbox" - ID of container, inside which grid was initialized ( grid.entBox.id )