How to prevent auto save using javascript in MS CRM

Create a new Javascript file preventAutoSave.js with the following method.

function preventAutoSave(econtext) 

{

    var eventArgs = econtext.getEventArgs();

    if (eventArgs.getSaveMode() == 70) 

      {

          eventArgs.preventDefault();

      }

}               

Other important values of Save Mode options are given below (Please refer CRM 2013 SDK Documentation for complete list)

Event Mode	Value
Save	1
Save And Close	2
Save and New	59
Save as Completed	58
Auto Save	70