If we tell you, you'll forget...however if you re-read the original post you will teach yourself, which leads me to believe that you will retain more of the information which you have Learned Re-Read the OP Please Then if you still have any questions please come back and post again...i don't say this to be a butthead or anything...i'm just trying to get you to burn this into your grey matter Holiday Hugs to you ChemCat