jQuery Grid Plugin - jqGrid

function bind_single_select() {
if (!$("input#single").length > 0) {
$("span.single_select").prepend("<input type='checkbox' name='single' id='single' checked='checked' style='vertical-align:middle' />");
}
 $("table#gridTable").find("tr").click(function () {
 if ($("input#single").attr("checked")) {
  $(".trSelected").removeClass("trSelected");
  $(this).addClass("trSelected");
 }
});
}

I found this in Flexigrid but in JQGrid How can I do it in ?

Another Question :

                 .navButtonAdd('#pager', { caption: "Add", buttonimg: "/Areas/Pages/Content/Images/add.png",
                                onClickButton: function () {
                                    PopupCenter('<%= Url.Action("CreatePublisher","Publisher") %>', 'CreatePublisher', '500', '300');
                                }, position: "last"
                 })
the buttonimg is not work even I use 
ui-icon-plus

Thanks in Advance.

	function bind_single_select() {
			    if (!$("input#single").length > 0) {
			        $("span.single_select").prepend("<input type='checkbox' name='single' id='single' checked='checked' style='vertical-align:middle' />");
			    }
			    $("table#gridTable").find("tr").click(function () {
			        if ($("input#single").attr("checked")) {
			            $(".trSelected").removeClass("trSelected");
			            $(this).addClass("trSelected");
			        }
			    });
			}