convert psd files to sgv format

http://graphicdesign.stackexchange.com/questions/10695/get-a-vector-path-from-photoshop-to-inkscape-or-svg

http://en.wikipedia.org/wiki/Wikipedia:Graphics_Lab/Resources/PDF_conversion_to_SVG

http://msdn.microsoft.com/en-us/magazine/cc164114.aspx

Highlight map using jquery

http://davidlynch.org/projects/maphilight/docs/
https://github.com/kemayo/maphilight
http://www.outsharked.com/imagemapster/
https://github.com/jamietre/ImageMapster

Finally I used one svg image file and simply changed the css in it to display highlight color on mouse over. The svg file can be found here.

Javascript loop through objects

http://stackoverflow.com/questions/921789/how-to-loop-through-javascript-object-literal-with-objects-as-members

Using SVG map in html file

http://css-tricks.com/using-svg/

Create image map online

https://www.google.co.uk/search?q=jquery+fill+map&oq=jquery+fill+map&aqs=chrome..69i57j0l5.8274j0j8&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8#q=create+image+map+online

Ajax callback on success and failure

AJAX
http://stackoverflow.com/questions/14220321/how-to-return-the-response-from-an-ajax-call

JSON
http://api.jquery.com/jquery.getjson/

Find nearest marker in Google Maps

http://stackoverflow.com/questions/4057665/google-maps-api-v3-find-nearest-markers