$("#ModulesGrid").jqxGrid({
        width: 890,
        height: 350,
        theme: modulesTheme,
        columnsresize: true,
        source: dataAdapter,
        pageable: true,
        editable: true,
        columns: [
                  { text: 'Module Name', datafield: 'modulename', width: 100, editable: false },
                  { text: 'Optional', datafield: 'Optional', columntype: 'checkbox', width: 100 },
                  { text: 'Assigned', datafield: 'Assigned', width: 80 , columntype: 'checkbox'},
                  { text: 'Pass', datafield: 'pass',cellsrenderer: radioRenderer,width: 50, editable: false },
                  { text: 'NC', datafield: 'nc',cellsrenderer: radioRenderer,width: 50, editable: false },
                  { text: 'Fail', datafield: 'fail',cellsrenderer: radioRenderer,width: 50, editable: false },
                  { text: 'Re-Cert', datafield: 'recert', columntype: 'checkbox', width: 50, cellvaluechanged: function(event){alert(1);}},
                  { text: 'Re-Cert Reason', datafield: 'reason', width: 100, editable: false},
                  { text: 'Prior Cert', datafield: 'priorcert', width: 50, editable: false }
              ]
    });

$("#ModulesGrid").bind('cellbeginedit', function (event) {
     var args = event.args;
  alert("Column: " + args.datafield + ",
           Row: " + (1 + args.rowindex) + ", Value: " + args.value);
});

{ text: 'Re-Cert', datafield: 'recert', columntype: 'checkbox', width: 50 },

var columncheckboxRenderer = function(row, column, value) {
    var html;
        html = '<span style="margin:4px;float:left" onclick="clickImage(this,'
                + row + ')"><img alt="selectme" class="image-unchecked" '
                +  src="../../Images/checkbox_off.png"/></span>';

    return html;
}

{ text: 'Re-Cert', datafield: 'recert',  width: 50,
          cellsrenderer: columncheckboxRenderer, renderer: header},

$("#grid").on("cellvaluechanged", function (event) {
        var theKey = $("#grid").jqxGrid("getcellvalue", event.args.rowindex, "key");
        doSomething(theKey, event.args.newvalue);
    });