non editable field, just show selected value in dropdown

just in case my question to the old ticket didn't come to light,
http://stackideas.com/forums/profile-field-make-not-editable-on-edit-and-suggestion-request

I am currently working on custom dev to display a selected field value only ( not editable ), which comes from a dropdown field. This value is modified by another custom script due to value that user input in different field.
Much appreciate which script that I need to modify it..

Many thanks