Fix Java Script Error in Zen Photo

My website has a Zenphoto gallery that has a javascript error. The website is here: <[login to view URL]> The error occurs when you click on a link below any of the pictures. The summary of the error is: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322) Timestamp: Thu, 8 Oct 2009 00:11:37 UTC Message: Invalid argument. Line: 12 Char: 2299 Code: 0 URI: <[login to view URL]>