Reply To: Object Layer Options Scripting

At the request of Eva Healy I modified Jongware’s script to handle Illustrator files.
I also added some detailed instructions inside so even the ungeeky among us can manipulate what layers to show.

app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Show/Hide Layers - Illustrator");
function Main()
{
    var page, placedFile, links, layer, i, j, k,
    doc = app.activeDocument;
    pages = doc.pages;
    var checklist = [];
    var layernames = [ "red", "blue", "green", "silver"];
    
        /* -------------------------------------------------------------------------------------------------------
         ABOVE IS WHERE YOU ALTER THE LAYER NAMES:
        After the words "var layernames" there's an opening square bracket , then some sets of text enclosed in quotes sperated by commas, and at the end, a closing square bracket.
        Delete all of the text and the commas separating it, and in its place put in any layers that you want.
        For example: If you have three layers, 'red', 'green' and 'silver', then in the brackets put in each layer enclosed in quotes and seperated by a comma, as such: ["red", "green", "silver"].
        Make sure they are all double-quotes, not single quotes, and make sure they are 'straight' quotes not 'smart' quotes.
        To ensure that it's properly formatted, only edit the script in a generic text editor (such as Notepad on Windows, or Text Wrangler on Mac).
        DO NOT use a word-proccesing program such as MS Word or InDesign, as that will add formatting to the script and it will not work properly.
      -------------------------------------------------------------------------------------------------------  */
  
    var ilDialog = app.dialogs.add({name:"Image Layers on/off", canCancel:true});
    with (ilDialog)
    {
        with(dialogColumns.add())
        {
            with(dialogRows.add())
            {
                staticTexts.add ({staticLabel:"Check to show, uncheck to hide"});
                for (i=0; i<layernames.length; i++)
                {
                    with(dialogRows.add())
                    checklist.push (checkboxControls.add({staticLabel:layernames[i], checkedState:false}));
                    }
                }
            }
        }
    var numChanges = 0;
    var imageChange;
    if (ilDialog.show() == true)
    {
        links = doc.links;
        for (i = links.length-1; i>=0; i--)
        {
            placedFile = links[i].parent;
            // show the internal type of this image:
             //alert (placedFile.constructor.name+" / "+placedFile.itemLink.linkType);
            if (placedFile.constructor.name == "PDF" && placedFile.itemLink != null && placedFile.itemLink.linkType == "Adobe Portable Document Format (PDF)")
            {
                imageChange = false;
                for (k=0; k<layernames.length; k++)
                {
                    layer = links[i].parent.graphicLayerOptions.graphicLayers.item(layernames[k]);
                    if (layer.isValid && layer.currentVisibility != checklist[k].checkedState)
                    {
                        layer.currentVisibility = checklist[k].checkedState;
                        imageChange = true;
                        }
                    }
                if (imageChange)
                numChanges++;
                }
            }
        alert("Done, made changes in "+numChanges+" images");
        } else
    {
        ilDialog.destroy();
        }
    }