var f = app.documents.firstItem().textFrames.itemByName('x'); 

tell application "Adobe InDesign CS5" 
   
  -- Initialisierung  
  set myDocument to active document 
  tell myDocument 
    set aSel to every text frame whose label is "Tabellenkopf_VA" 
  end tell 
  if aSel = {} then 
    return 
  end if 

var f = get_item_by_name( app.documents.firstItem().pageItems, 'x'); 
 
function get_item_by_name( all_items, a_name) 
{ 
    var a = new Array; 
    for (var i = 0; i < all_items.length; i++) 
    { 
        if (all_items.item(i).name == a_name) 
        { 
            a.push(all_items.item(i)); 
         } 
    } 
    return a; 
} 

var f = get_item_by_name( app.documents.firstItem().pageItems, 'x'); 
 
function get_item_by_name( all_items, a_name) 
{ 
    var a = new Array; 
    for (var i = 0; i < all_items.length; i++) 
    { 
        if (all_items.item(i).label == a_name) 
        { 
            a.push(all_items.item(i)); 
         } 
    } 
    return a; 
} 

tell application "Adobe InDesign CS5" 
   
  -- Initialisierung  
  set myDocument to active document 
  tell myDocument 
    set aSel to {} 
    set allPageItems to all page items 
    set allLabels to label of all page items 
    repeat with i from 1 to count of allLabels 
      set curItem to item i of allLabels 
      if curItem is "Tabellenkopf_VA" then 
        set end of aSel to item i of allPageItems 
      end if 
    end repeat 
  end tell 
  if aSel = {} then 
    return 
  end if