I need to retain the value of gridid throughout the session.

The sample code is given below.

object gridid extends RequestVar(S.param("gridid") openOr "")
class CreateDominoColDefinition extends StatefulSnippet{

   def dispatch = {
    case "createColDef" => createColDef _
def createColDef(html:NodeSeq):NodeSeq ={


The value is retained with the submit button clicked for the fist

Then its value becomes empty string with the click of the submit
button more than once.

 What do I need to do  to retain the  value for the gridid .


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