$('#myTbl').jqGrid({
    datatype: "local",
    autowidth: true,
    height: 500,
    gridview: true,
    loadonce: true,
    deselectAfterSort: false,
    forceFit: true,
    rowNum: -1,
    sortname: 'rowid',
    colNames: ['Id', 'Number','Description', 'Street', 'Zipcode 'City'],
    colModel: [{name:'rowid', hidden: true},
               {name:'number', width: 80},
               {name:'description'},
               {name:'street'},
               {name:'zipcode',width:60},
               {name:'city'}],
    ondblClickRow: function (rowid, iRow, iCol) {
        $('#editRow').trigger ('click');
    },
    onSelectRow: function () {
        selectId = $('#myTbl').getRowData ($('#myTbl').getGridParam('selrow')).rowid;
    }
});
$('#myTbl').setGridWidth (600);