HELP Final Project error!

hello rollover images not work after click somewear other home. click on media , of them stop working. please help! http://www.tropicalwatergardens.com/new

have here http://validator.w3.org/check?verbose=1&uri=http%3a%2f%2fwww.tropicalwatergardens.com%2fne w%2fmedia.html

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