[JS][CS3] $ID/CellStylesPanelPopup (table...)

Question

I have been struggling to access the "Select All Unused" menu from the Cell Styles Panel.
But the panel does NOT exists!!!
However there is a "$ID\CellStylesControlPanelPopup", but it stops at the 1st 10 entries and number 11 is the "Select All Unused"...
Can anyone let me know the "name of the panel menu or popup?
Same thing for the following Character & Paragraph Styles, but in this case the Panel itself.
I prefer using names instead of indexes, in case they change between versions.
app.panels[2].visible = true;     //*** OK
app.panels.item("Character Styles").visible = true;     //*** ERROR
Also what is the difference when using $ID??? Sometime the $ID won't work, especially multi words name.
app.panels.item("Layers").visible = true;     //*** OK
app.panels.item("$ID/Layers").visible = true;     //*** OK
app.panels.item("Object Styles").visible = true;     //*** OK
app.panels.item("$ID/Object Styles").visible = true;     //*** ERROR
BACK to my ORIGINAL question...
Can anyone let me know the name of the CELL or TABLE panel popup?
And maybe can explain to me the naming logic? There is not much literature or list regarding menus.
Thank you, Alex.
Some code that works if you replace Cell with Object to access the later's submenu.
var myMenu = app.menus.item("$ID/CellStylesPanelPopup");
alert (myMenu.name);     //*** TEST
var myMenuItem = myMenu.menuItems.item("Select All Unused");
var myMenuAction = myMenuItem.associatedMenuAction;
myMenuAction.invoke();
var myAnswer = confirm ("Remove UNUSED Cell Styles? (Y/N)", false);
if (myAnswer)
  try
   var myMenu = app.menus.item("$ID/CellStylesControlPanelPopup");
   var myMenuItem = myMenu.menuItems.item("Delete Style...");
   var myMenuAction = myMenuItem.associatedMenuAction;
   myMenuAction.invoke();
  catch (e)
   var myMenu = app.menus.item("$ID/CellStylesControlPanelPopup");
   var myMenuItem = myMenu.menuItems.item("Delete Styles...");
   var myMenuAction = myMenuItem.associatedMenuAction;
   myMenuAction.invoke();

Answer 1

I will study further more about the $ID. It looks like between revisions (CS3 --> CS5) the differential behavior w/ or w/o the $ID has been resolved.
Regarding the original issue: Accessing The Cell Styles Panel submenu "Select All Unused". The same goes for the Table Styles.
The goal is to delete all used Cell Styles same for the Table Styles. Viewing the panel is no problems, it works.
Looking at the name of the panel (GUI), I was expecting "$ID/CellStylePanelPopup" to work.
FYI, the Character Styles are located under "$ID/CharStylePanelPopup" and the Paragraph Styles are under "$ID/ParaStylePanelPopup".
So the naming convention is a little astray.
About the code, I left some old code that I was testing on a different action "Break Link to Style" which I found under "$ID/CellStylesControlPanelPopup".
So here is the revised version
app.panels.item("Cell Styles").visible = true;          //*** OK
var myMenu = app.menus.item("$ID/CellStylesPanelPopup");
alert (myMenu.name);          //*** ERROR
var myMenuItem = myMenu.menuItems.item("Select All Unused");
var myMenuAction = myMenuItem.associatedMenuAction;
myMenuAction.invoke();
var myAnswer = confirm ("Remove UNUSED Cell Styles? (Y/N)", false);
if (myAnswer)
  try
   var myMenu = app.menus.item("$ID/CellStylesPanelPopup");
   var myMenuItem = myMenu.menuItems.item("Delete Style...");
   var myMenuAction = myMenuItem.associatedMenuAction;
   myMenuAction.invoke();
  catch (e)
   var myMenu = app.menus.item("$ID/CellStylesPanelPopup");
   var myMenuItem = myMenu.menuItems.item("Delete Styles...");
   var myMenuAction = myMenuItem.associatedMenuAction;
   myMenuAction.invoke();