jqgrid删除按钮出问题

jqgrid删除按钮出问题
我写的代码如下：
function getGrid(){
      // 定义标题（列）
      var c_fild = new Array();
      var colm = new Array();
      c_fild = s_fild.split(",");
      for(i=0;i<c_fild.length;i++){
        colm.push({display: c_fild[i],name : c_fild[i], width :120, sortable : true, align: 'center'});
      }
      $(function(){
jQuery("#list2").jqGrid({
   url: 'post.jsp?s_table='+s_table+'&s_id='+s_id+'&s_fild='+s_fild+'&s_where='+s_where,
datatype: "json",
mtype: 'POST',  
/*
   colNames:['id','username', 'password', 'age','address'],
   colModel:[
   {name:'id',index:'id', width:55},
   {name:'username',index:'username', width:90},
   {name:'password',index:'password', width:100},
   {name:'age',index:'age', width:80, align:"right"},
   {name:'address',index:'address', width:80, align:"right"}
   ],
   */
   colModel:colm,
   rowNum:4,
   rowList:[4,20,30],
   pager: $('#pager2'),
   sortname: 'id',
    viewrecords: true,
    sortorder: "asc",
    //height:'500px',
    //width:'800px',
jsonReader: {//jsonReader来跟服务器端返回的数据做对应  
            root: "rows",    
            page: "page",    
            total: "total",   
            repeatitems : false      
        }, 
   
    caption:"JSON Example"
}).navGrid('#pager2',{editfunc:doEdit,addfunc:doAdd,delfunc:doDel});

});
}
var doEdit=function(rowid){alert(rowid);};
var doAdd=function(){alert(126);};
var doDel=function(){alert(123);};



为什么选中行点删除的时候 没有123弹出，而是弹出默认的删除界面。
而点增加修改时没有问题。
请用过的人指点。
谢谢了！

写成[code="javascript"]jq("#grid").navButtonAdd('#pager',
{ caption:"Delete",
buttonicon:"ui-icon-trash",
onClickButton: deleteRow,
position: "last",
title:"",
cursor: "pointer"
}
);

function deleteRow() {
// Get the currently selected row获得当前选择的选项
var row = jq("#grid").jqGrid('getGridParam','selrow');

var len = rows.length;

if( rows != null ){

    jq("#grid").jqGrid( 'delGridRow', row,
            { url: '/spring3JqGrid/crud/delete', 
                        recreateForm: true,
                        beforeShowForm: function(form) {
                          //change title
                          jq(".delmsg").replaceWith('<span style="white-space: pre;">' +
                                  'Delete selected record?' + '</span>');
                          //hide arrows
                          jq('#pData').hide();  
                          jq('#nData').hide();  
                        },
                        reloadAfterSubmit:false,
                        closeAfterDelete: true,
                        afterSubmit : function(response, postdata) 
                        { 
                            var result = eval('(' + response.responseText + ')');
                            var errors = "";

                            if (result.success == false) {
                                for (var i = 0; i < result.message.length; i++) {
                                    errors +=  result.message[i] + "<br/>";
                                }
                            }  else {
                                jq("#dialog").text('Entry has been deleted successfully');
                                jq("#dialog").dialog( 
                                        {   title: 'Success',
                                            modal: true,
                                            buttons: {"Ok": function()  {
                                                jq(this).dialog("close");} 
                                            }
                                        });
                            }
                            // only used for adding new records
                            var new_id = null;

                            return [result.success, errors, new_id];
                        }
            });


}else{
      jq( "#dialogSelectRow" ).dialog();
}

[/code]