check edit permission on a specific list/web using ecma script

I.Add Script two files
1.jquery-1.8.2.min.js
2.jquery.SPServices-0.7.2.min.js
in the bellow Content Place Holder
<asp:Content ContentPlaceHolderId="PlaceHolderMain" runat="server">

<script type="text/javascript" src="../../SiteAssets/js/jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="../../SiteAssets/js/jquery.SPServices-0.7.2.min.js"></script>
II. Call function in the document.Ready function
using following code we can check user permission (edit) on a specific list
var _currentUser;
var _theList;
function Editpermissions()
{       
    context = new SP.ClientContext.get_current();
    web = context.get_web();
    this._currentUser = web.get_currentUser();
  // here mention list name ex: employee
    this._theList = web.get_lists().getByTitle('employee');
    context.load(this._currentUser);
    context.load(_theList, 'EffectiveBasePermissions');  
    context.executeQueryAsync(Function.createDelegate(this, Success), Function.createDelegate(this, Failure));
}
function Success()
 {
   if (this._theList.get_effectiveBasePermissions().has(SP.PermissionKind.editListItems))
    {
       alert('User Can Edit the list.');
    }
    else
    {
       alert('User Can NOT Edit the list.');
    }
}
function Failure()
{   
  alert('unable to perform the action');
}
using following code we can check user permission (edit) on a specific web
 function checkpermission()
 { 
      var context;    
      context = new SP.ClientContext.get_current();
      web = context.get_web();
      context.load(web, 'EffectiveBasePermissions');   
      context.executeQueryAsync(onSuccess, onFailure);  
 }
 function onSuccess()
 {
    if (web.get_effectiveBasePermissions().has(SP.PermissionKind.manageWeb))
     { 
     alert('User Can Edit the list.');
    }
}
 function onFailure()
 {
   alert('unable to perform the action');
}