javascript - Uncaught TypeError: Cannot call method 'removeClass' of undefined -

I created a jquery mobile checkbox group dynamically. And want to enable binding event to enable selection of all functions. Once executed, the Chrome console indicates "Unkot type error: Undefined" removeClass "method can not call." The JS code is:

  var arr = ['& lt; Fieldet id = "countryContainer" name = "country container" data-roll = "control group" data-type = "horizontal" & gt; ']; Arr = push ('& lt; input type = "checkbox" id = "country_all" name = "country_now" value = "all" />  '+ i +'  for ";;); } Arr.push ('& lt; / fieldset & gt;'); $ ('[Name = CELL1]') attached (arr.join ('')). $ .mobile.pageContainer.trigger ("create"); Var chkall = $ ('[name = country_all]'); Chkall.on ('change', function) {var check = (chkall.prop ('checked') == "checked") True: $ ("# countrycontainer") .pop ('checked', true). Checkboxed (checkboxed) ("refresh"); // something goes wrong.});   
 and html:  
 & lt; Table & gt; 
 & lt; Tr & gt; 
 & lt; Td id = "j_9" name = "cell 1" class = "mobilegridcell1" colspan = "1" rowspan = "1"> gt; & Lt; / Td> & Lt; / Tr & gt; And & lt; / Table & gt; 
  
 This is the thing that the country wants to select all the checkboxes in the country by selecting all the checkboxes in the country. Any ideas?   
 
 
 The problem is resolved I checked on the field. CheckboxRod ('refresh') is lost. Thanks for @Omar