A map page reading marker and infowindow data from a text file. It comes equipped with a 2-way interactive sidebar. That that fulfills many basic needs.
If you have a single file with not very many markers and they do not overlap, you don't need the upcoming parts of this series. Just copy the code and display your file. You can make the infowindow and sidebar look good by css.
Sidebar label and marker tooltips title are the same as infowindow header. The data cell of them is still hardcoded  but it is easy to find in the source code and can be changed independently to any cell in your csv line.
I suddenly noticed that [part 1] did not parse the text file with IE7. It is fixed now and it was just introducing the parseCsv() too late in the code for IE. Risk of that kind of troubles is avoided when I package the methods as a library. There are methods coming before that.
Too many markers is the most common UI issue on map pages. The following parts will show methods for filtering the markers.