jQuery Grid Plugin - jqGrid

Hello

i have a grid with datatype "clientSide". There is NO Ajax, no Backend-Server, nothing to do via the grid itself while editing.

I add the rows programmatically in JavaScript and want give the user the ability to edit within the cells without any Ajax-Calls.

But after pressing Enter there comes still the following Error-Message "No url is set".

So, I dont want to set an URL. I want to handle the Input programmatically on client Site with JavaScript on a later time.

What can i do?

Thank you very much for any help

My Grid-Definition is the following:

[CODE]

$(self.tblID).jqGrid({
            datatype: 'clientSide',
            cellEdit: true,
            height: '200px',

            // Column-Headers               
            colNames: ['Datum', 'Lfd. Beitrag', 'Sonderzahlung', 'Rentenanspruch', 'Anspruch bfr.', 'Anspruch Baustein', 'Anspruch Sonderzhlg.', 'Überschußbtlg.', 'Kapital'],

            // Column-Model
            colModel: [
                    { name: 'Datum', index: 'Datum', width: 129, sorttype: 'date', align: 'center', editable: true, editrules: { required: true, date: true} },
                    { name: 'Beitrag', index: 'Beitrag', width: 120, sorttype: 'float', align: 'right', editable: true },
                    { name: 'Sonderzahlung', index: 'Sonderzahlung', width: 120, align: 'right', sorttype: 'float', editable: true },
                    { name: 'RentenAnspruch', index: 'RentenAnspruch', width: 120, align: 'right', sorttype: 'float' },
                    { name: 'RentenAnspruchBfr', index: 'RentenAnspruchBfr', width: 120, align: 'right', sorttype: 'float' },
                    { name: 'RentenAnspruchAusBeitrag', index: 'RentenAnspruchAusBeitrag', width: 120, align: 'right', sortable: false },
                    { name: 'RentenAnspruchSZ', index: 'RentenAnspruchSZ', width: 120, align: "right", editable: false },
                    { name: 'RentenAnspruchGA', index: 'RentenAnspruchGA', width: 120, align: "right", editable: false },
                    { name: 'Kapital', index: 'Kapital', width: 120, sortable: false, editable: false }
                    ],
            pager: jQuery(self.pagerID),
            rowNum: 20,
            viewrecords: true,
            imgpath: gridimgpath,
            afterEditCell: function(rowid, cellname, value, iRow, iCol) {
            }
        });

[/CODE]