[OpenLayers-Users] Where Do I Find A List of Available Hashtable Options?

[Bill Thoen]

In several places in the OpenLayers Constructor functions there is a 
parameter that is an object consisting of a "Hashtable of extra 
options...", but I can't find a list of what those choices might be. For 
example, the fourth parameter for OpenLayers. Layer. MapServer() is such 
an object. What are the available tags that can be used here and where 
do I find out what these are? Are they the parameters from a map file, 
like LAYER.CLASS.STYLE.COLOR: "255 255 0" or something like that?

TIA,
- Bill Thoen