> Ah, I see. I should have done my homework before firing > off a suggestion. No worries. James' requirement is actually turning out to be a bit trickier to accomplish than first thought Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7690 / Virus Database: 4627/12748 - Release Date: 08/04/16 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .