Google Maps API Basic Tutorial - different numbered icons from XML

This is an example based off of Mike Williams' Google Map API Basic tutorial (I started from this page). It extends his example with some basic error handling and the addition of different numbered icons. It also demonstrates how to dynamically load different xml files using a form and AJAX.

• This is a page which loads a valid xml file (example_icons.xml) which uses different colored icons (same size and shape as the default maker, just different colors)
• This is a page which loads a valid xml file (example_icons.xml) which uses different colored icons (the little ridefinder icons)
• This is a page which loads a valid xml file (example_letter.xml) which uses different lettered icons (the default Google lettered icons)
• This is a page which loads a valid xml file (example.xml) using Google's default marker
• This is a page which loads the example xml file (MWexample3.xml) from Mike's tutorial with html formating embedded in the xml file.
• This page tries to load an invalid xml file (example_invalid.xml) (will give the "invalid xml file" error)
• nothere.xml (or most other strings) will give the "file not found" error