JS old scripts tidying and documenting

scripts/TableSort.js

@@ -1,4 +1,9 @@
 function filterTable(tablename)
+// Used by Radost's single HTML page to sort list of all caves
+// in expoweb/caves-tabular.htm
+// where the data is all in that html file, having been extracted from 
+// the svx files by an undocumented method. Probably from the .3d file// produced by 
+//survex.
 {
   table = document.getElementById(tablename);