This is just out of curiosity. It does take some knowledge of calculus. I'm just wondering if anyone here has created a script to find the derivative and/or anti-derivative of an equation. I'm also wondering whether it's possible to find the derivative and/or anti-derivative of a JavaScript function. I doubt it but... <p>REH<br><a href=mailto:hawkdogg@crosswinds.net>hawkdogg@crosswinds.net</a><br><a href= by Linux</a><br>Learn Linux and Leave out the Windows