SharePoint list item CRUD operations using Javascript

SharePoint list item CRUD

Insert
http://microsoft-techies.blogspot.com/2014/07/sharepoint-list-insert-person-or-group.html

Update
http://microsoft-techies.blogspot.com/2014/07/sharepoint-list-item-update.html

Read
http://microsoft-techies.blogspot.com/2014/03/sample-code-to-load-data-from.html

Delete
http://microsoft-techies.blogspot.com/2014/07/sharepoint-list-item-delete-by-id-csom.html

Attachments
Read:
http://microsoft-techies.blogspot.com/2014/07/sharepoint-read-list-item-attachments.html
Upload:
http://microsoft-techies.blogspot.com/2014/08/uploading-files-using-rest-api-and.html
Remove:
http://microsoft-techies.blogspot.com/2014/07/remove-sharepoint-list-item-attachment.html