I integrated a full searchable image database on http://www.clivenichols.com/ some years ago now but just this week I was asked to add the feature of a screen resolution popout when mousing over thumbnails.
Javascript is outside my remit but I was very pleased to introduce Edward Leigh of Excogitate (http://excogitate.co.uk/) to Clive and and help him to add the function.
You can see the results here: http://www.clivenichols.com/cgi-bin/stephen_johnson/database/imageFolio.cgi?&bool=or&search=48k
Edward and I have a small network of specialists who can help out on various projects and allow us to take on larger consultancies whilst providing backup for each other.