Just for review, no comments required, (and apologies to PrimeForm for being slighly skew); http://www.users.globalnet.co.uk/~perry/maths/primegraph/primegraph.htm Jon Perry perry@globalnet.co.uk http://www.users.globalnet.co.uk/~perry/maths/ http://www.users.globalnet.co.uk/~perry/DIVMenu/ BrainBench MVP for HTML and JavaScript http://www.brainbench.com