Take a look in here :
http://www.doc.ic.ac.uk/~nd/surprise_96/journal/vol4/cs11/report.html
then go here :
http://www.ai-junkie.com/ann/evolved/nnt1.html
then use this to Back-Propagate:
http://www.philbrierley.com/
finally buy this:
http://www.amazon.com/Machine-Learning-Algorithmic-Perspective-Recognition/dp/1420067184/ref=ntt_at_ep_dpi_1
enjoy coding !!