Check to see if a value exist for a specific class & id pair

Check to see if a value exist for a specific class & id pair

I need to require entry in specific circumstances. 

1) a class (.securefield) must be absent on the field and the user must have edited the field. If class .secureifield is not on the field then if it contains data the user DID EDIT IT. 

So I think what I need is to select all fields that do not have the class securefield and then limit it to the target field id - #sigfield.

would $('!.securefield').('#sigfield').val() select the field contents properly?

Thanks.