how to set field values based on another field values selection

[koteswararao puralasetty]

Hi Team,

I am using script runner plugin in my organization, I am looking to set the field values based on another field values?

Like I have single select fields called "SIT" and values Yes, No,

  and I have one more select field called "SQT" values Yes, No,

When I select "Yes" value in "SIT" I need to see only "No" value in "SQT" field.

If I select "No" value in "SIT" I need to see only "Yes" value in "SQT" field.

can you help me with right script code to achieve this.

Thanks,

Koteswara Rao