jQuery Grid Plugin - jqGrid

hellow

I defined a grid as subgrid, with an event "onSelectRowTopics" wich concerne my subgrid and not parent grid rows.

this is my code

<sjg:grid

id="gridtable_recours"

dataType="json"

href="%{remoteurl}"

>

<sjg:grid

id="gridtable_recours"

dataType="json"

href="%{remoteurl}"

onSelectRowTopics="rowselect"

>

<sjg:gridColumn name="infoElecteur.region.libelle" index="infoElecteur.region.libelle" title="Région" sortable="true"  />

...........................(other column)..................

</sjg:grid>

<sjg:gridColumn name="dossierRecours.dateDepot" index="dossierRecours.dateDepot" title="Date de dépôt" sortable="false" />

...........................(other column)..................

</sjg:grid>

<script>

function manageDetails() {

var tableP = jQuery("#gridtable_recours");

var id = tableP.jqGrid('getGridParam', 'selrow');

alert('Selected Rows : '+id );

};

$.subscribe('rowselect', function(event, data) {

manageDetails();

});

</script>

the problem is that i retrieve the rowid with null value.

any suggestion

thanks