<wctags:contextPicker id="contextPickerId"
pickerCallback="myPickerCallback" />

function myPickerCallback(objects, pickerID)

{

var updateHiddenField = document.getElementById(pickerID);

var updateDisplayField = document.getElementById(pickerID +
"$label$");

var myJSONObjects = objects.pickedObject;

for(var i=0; i< myJSONObjects.length;i++) {

var oid = myJSONObjects[i].oid;

// Here “name” is the displayAttribute requested

var displayAttr = eval("myJSONObjects[i].name");

updateHiddenField.value=oid;

updateDisplayField.value=displayAttr;

}

}