jQuery Grid Plugin - jqGrid

Hello,

I am using jQuery v1.6.2 and jqgrid v4.2

here is my code for deleting a grid row:

serverResponse is "ok" - but I get the error G.split is not a function

It works fine for adding and updating.

function deleteUser(){

var gr = jQuery("#<?php echo $unique;?>List").jqGrid('getGridParam','selrow');

if( gr != null )

if(gr != 2) {

jQuery("#<?php echo $unique;?>List").jqGrid('delGridRow',gr,{

reloadAfterSubmit:false,

jqModal:false,

closeOnEscape:true,

afterSubmit:function(serverResponse, postdata){

s = jQuery.parseJSON(serverResponse.responseText);

if (s == "ok"){

return [true,"",""]

}

else

return [false,s,""];

}

});

}

else {

$.jgrid.info_dialog($.jgrid.errors.errcap,'<div class="ui-state-error">System user cannot be deleted.</div>', $.jgrid.edit.bClose,{buttonalign:'right'});

}

else

alert("Please Select Row");

}

Any help would be appreciated.

Thanks,

Kris