How to set AutoLoad Param client side?

[Tbaseflug]

I have a tab - want to use the below - but instead of the hard-coded value ("6420") - want to use a HIDDEN value - is that possible?




<AutoLoad Url="ADDB.aspx" Mode="IFrame">


<Params>


<ext:Parameter Name="NO" Value="6420"></ext:Parameter>


</Params>


</AutoLoad>