Google Maps API tricks

Average users don't care about zoom level numbers, but some people do. Developers do.
I created a 'semihidden' zoom level display for my pages. Google provides hints like "zoom in" and "zoom out" if you hover the zoom control element (slider). I thought that average map users already know those things....

Distance Matrix service was introduced in the latest update of v3 API. It returns maximum 100 driving distances and durations by a single request. Reference.
All of you who have a store locator, can now add true driving distances and estimated driving times in search results. Also you can filter out results that exceed a distance limit. If user searches by 100 km radius, you may want to return only results...

Quadtree is a powerful spatial indexing technique. Wikipedia.
Every now and then I been thinking to implement a collision detect function using quadtree. Playing with quadtrees is so fascinating that I haven't got as far as collision detect, but I have a simple general quadtree demo page online. Play with it. It...

Thanks for many of you that been applying the category sidebar script I wrote a long time ago for v2. Sure It works on desktop but what happens if all the entries don't fit in the limited viewport of a mobile browser?
Web has changed since. Now we have to make pages that can be used by mobile browsers too. The screen size can be equal or smaller to the first Mac....