ExtendScript example for Frame - changing tags by table column

Question

In the excellent book Unstructured Framemaker 11, there is Chapter 25 on using Extendscript, the only place I have seen
a cogent, coherent walkthrough of the history behind ExtendScript for Frame (evolving form the FDK) and an example showing good
design principles. The example shows how, starting from the small to the large tasks, select a cell, filter it for a criteria, and highlight the
cell, make these functions, then wrap these in functions that select all the tables of a specific name, then go through a document, etc.
I would like to learn more about Extendscript, I'm going through the Scripting Guide, but the key is the tweak for finding a specific column,
changing the tag for the heading cell of the column to a specified format, then changing the remaining "normal" cells of the column to a specified format.
That is the trick, since the heading cell needs have the option to be a different format, since the tag_name would help identify the rest of cells in the
column.
I'll come up with the main parts of the program, but it's the getting the specified column and specifying the heading cell and then the remaining
cells is the tricky part.

Answer 1

OK, starting at the lowest level is getting the column selected, since we need to select the correct column
before selecting the first cell in the column to rename (a separate funciton?) and then the remaining cells
in the column (another function)? Once these two functions are done, the rest would be like the example in the
the Frame book, since then you would have a function select only the tables that have a certain name and then
all the files in the book.
#target framemaker
// !! first, click on table
var doc=app.ActiveDoc;
//Get the table containing the insertion point
var tbl=doc.SelectedTbl;
//Get the first cell in the first row
var cell=tbl.FirstRowInTbl.FirstCellInRow;
var colNum=3;
for (var i=1; i<colNum; i+=1){
    cell=cell.NextCellInRow;
while (cell.ObjectValid()){
    var pgf=cell.FirstPgf;
    alert (pgf.Name);
    alert(cell);
    cell=cell.CellBelowInCol;// Move down to next cell