How to populate Assignment group and Assigned To on form load?

[Sid_Takali]

Hi All,

I have a requirement where I need to populate Assignment group and Assigned To field as soon as Escalation form open after clicking Escalate Case UI Action on Case form. How do I achieve this?

[Anurag Tripathi]

Id Use onload client scripty, so that it is populated on the form even before the new record is saved.