Application Express :: Copying Form Data To Clipboard

I have made one form and trying to pick up the data available on the form by pressing a copy button and want to take all the date into clip board. for an example I'm just picking one field at the moment named as p213_que_item_ref

following code is defined as application_process getquerydet (process point ondemand)

declare
item_ref varchar(30);
begin
item_ref = :p213_que_item_ref
HTP.prn (item_ref)
End;

In the header of the form querydetailsregion following code has been added

<script language="JavaScript" type="text/javascript">
function f_copytoCB ()
{
var get = new htmldb_Get(null,&APP_ID.,'APPLICATION_PROCESS=getqueryDet',0);
//var get = $v('P213_QUE_ITEM_REF')
get.add($v('P213_QUE_ITEM_REF'))
gReturn = get.get();
copy gReturn;
}
</script>

AND in the button URL added the following code

javascript:f_copytoCB();

But it is still not working .......

what is wrong with it.