{ 
  "FormPopup_JavaScript": {
    "table":"cust",
    "layout":"form",
    "onecolumn":true,
    "caption":["Customer","Customers"],
    "actions":"B",
    "fields":[
      {"name":"cust_id","caption": "ID"},
      {"name":"cust_name","caption":"Name"},
      {"control":"button","value":"Edit","onclick":"XExt.popupForm(xmodel.namespace+'FormPopup_Cust', 'update', {'cust_id':XModels[modelid].controller.form.Data.cust_id})"}
    ]
  }
}