How to save an entity record in CRM 2011 using javascript

In CRM 2011, you could save an entity record using javascript.

There are 3 types of save possible using javascript in CRM 2011.

1. Equivalent to 'SAVE' button found on the entity form

Xrm.Page.data.entity.save();
2. Equivalent to 'SAVE AND NEW' button found on the entity form

Xrm.Page.data.entity.save('saveandnew');

3. Equivalent to 'SAVE AND CLOSE'  button found on the entity form

Xrm.Page.data.entity.save('saveandclose');