I've Grid, where is photos in columns. I need to add/edit record, had the opportunity to upload file.

I've code:

and Grid:

$('#table').jqGrid({
url:'finish.php',
datatype: 'json',
mtype: 'POST',
colNames:['Название','Артикул','Количество', 'Цена','Бонус','Дата поступления','Фото'],
colModel :[                     
{name:'label', index:'label', width:200,search:true, editable:true,editoptions:{size:50},searchoptions:{sopt:['eq','lt','gt']}},
{name:'product_num', index:'product_num',search:true, width:50,align:'center', editable:false,searchoptions:{sopt:['eq','lt','gt']}},
{name:'quantity', index:'quantity',search:false, width:50,align:'center', editable:true,editoptions:{size:10}},
{name:'price', index:'price', width:50,align:'center', editable:true,editoptions:{size:10},searchoptions:{sopt:['eq','lt','gt']}},
{name:'bonus_asrt', index:'bonus_asrt',align:'center', width:50, editable:true,editoptions:{size:10},searchoptions:{sopt:['eq','lt','gt']}},
{name:'date_get', index:'date_get',align:'center',search:true, searchoptions:{sopt:['eq','lt','gt']},
stype:'text', searchoptions:{dataInit:function(element){       $(element).datepicker();}},
width:100, editable:true,formatter:"date",formatoptions:{srcformat:"d-m-y", newformat:"d-m-Y"},
editoptions:{size:10,dataInit: function(element){       $(element).datepicker();}}},
{name:'mainImg', index:'mainImg',align:'center',search:false, width:160,sortable:false, editable:true,edittype:'file'}],
width: 1000,
height: 700,
pager: $('#tablePager'),
rowNum:5,
rowList:[5,10,15,20,100],
sortname: 'label',
sortorder: 'asc',
caption: 'Ассортимент нашего магазина',
rownumbers: true,
rownumWidth: 40,
editurl:"finish.php",}); 
jQuery("#table").jqGrid('navGrid','#tablePager',
{edit:true,add:true,del:true,search:true,refresh:true},
{height:'auto',width: 'auto',reloadAfterSubmit:true,closeAfterEdit:true,
beforeSubmit:function(formid) {
$(formid).attr("method","POST");                
$(formid).attr("action","");                 
$(formid).attr("enctype","multipart/form-data");
$.ajaxFileUpload({
url:'finish.php',                 
secureuri:false,                 
fileElementId:'mainImg',                 
dataType: 'json',});                 
}                 
},                  
{height:'auto',width: 'auto',reloadAfterSubmit:true,closeAfterAdd:true,
beforeSubmit:function(formid) {
$(formid).attr("method","POST");
$(formid).attr("action","");
$(formid).attr("enctype","multipart/form-data");
$.ajaxFileUpload({
url:'finish.php',
secureuri:false,
fileElementId:'mainImg',
dataType: 'json',});
}},
{reloadAfterSubmit:true,top:400,left:400},
{closeAfterSearch:true,top:400,left:400}
 );
});
It's don't work. I've errors:
ret is undefined в jquery.jqGrid.src.js(line 7746)
and
jQuery.handleError is not a function в ajaxfileupload.js (line 116)

Very need help!

Sorry for my English