Below is very difficult code, many advanced features, please only reply if you understand how it works.
Not interested in obvious stuff like browser detect and active X and document writes, just in how maps work.
You forgive if code not perfectly formatted, it all come in one long line, took hours to format for you to read it.
This code not for faint heart, also why all code enclosed by //<![CDATA[, is this just XML terminology.
Appreciate help understanding methods used to display maps, and why scaling is granular, not even slider.
Below is code from a map display at maps.google.com, nicely formatted for you from one 10,000 char line!