in ie 11 if 
‘L_Menu_BaseUrl’ is undefined
‘L_Menu_LCID’ is undefined

use on top of the script 

if(typeof _spPageContextInfo !== "undefined" && _spPageContextInfo.webUIVersion === 15){
 var L_Menu_BaseUrl = L_Menu_BaseUrl || _spPageContextInfo.webServerRelativeUrl !== "/" ? _spPageContextInfo.webServerRelativeUrl : "";
 var L_Menu_LCID = L_Menu_LCID || _spPageContextInfo.currentLanguage.toString();
}