Rajeev Pentyala – Dynamics 365 Blog

We use event.returnValue=false statement, to stop the event execution. (i.e., I can stop my crm form’s save action, if I write event.returnValue=false statement on my onsave() event).

After I upgraded to UR12, I was getting script error, if I use the event.returnValue statement.

Reason

• Update Rollup 12 and December 2012 Service Update support additional browsers by generating HTML that supports W3C standards.
• This requires removing dependencies on HTML components (HTC) that are specific to Internet Explorer.
• Hence event.returnValue statement has been deprecated

Fix

• Use context.getEventArgs().preventDefault() function to cancel the event execution

How do I use this

• First to get “context”, enable the OnSave event handler to pass the execution context as the first parameter to the OnSave event handler.
• Open customization form -> Form Properties and in “Handler Properties” window, select the “Pass execution ….” checkbox

• 

  Pass execution context

• Next in your Jscript , read the context as first parameter

function onsave(context) {

// Prevent the event execution

context.getEventArgs().preventDefault();

}

Get more details on latest CRM JScript changes from this link

🙂