Select layer by name.

Question

I need to be able to select a specific layer by name to make active. I cannot find any documentation.
The layer name is always "PDF (Replace Contents...)" - then I'll replace the content with a specified  PDF (constant - naming convention also).
-kp

Answer 1

Search on getbyname in the scripting guides you will find documentation like this
The collections, as in this example, can be treated as arrays, which is useful for iteration. They also provide
methods to create their contained objects, and to access them by name:
var newLayer = activeDocument.artLayers.add(); // Create a new ArtLayer object
newLayer.name = "My Layer"; // name it for later reference
var layerRef = activeDocument.artLayers.getByName("My Layer");
so you would code somethinf like this
try { var layerRef = activeDocument.artLayers.getByName("PDF");}
catch(e){
                    alert("Document does not have the Required PDF layer");
                    var abort = true