There are ways to make one's thought understandable. It depends on the knowledge how much do you know the material. To make things clear. 1)Subject the main question 2)Write point forms 2.1) Write down all limitation 2.2) Group points that belong to each other 4)Finally end with intended result. John ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist