How to cancel all alert at once

Hi All,

I am trying to close alert at once but the loop continues the alert, how can I stop the alert at once

var doc = app.activeDocument

var layersToTargetNameArray = ["Background", "Artwork", "diecut", "size", "sign off panel"];

for (var i = 0, il = doc.layers.length; i < il; i++) {

    var curLayer = doc.layers;

    for (var j = 0, jl = layersToTargetNameArray.length; j < jl; j++) {

        if (curLayer.name == layersToTargetNameArray) {

            // --------------------------------------------

            // do something if layer name found

with (doc) {

var docName = baseName(name);

var pdfOptions = new PDFSaveOptions();

pdfOptions.PDFPreset = '[High Quality Print]';

var saveAsPath = new File('~/Desktop/Watched Folder/Out/' + docName + '.pdf');

saveAs(saveAsPath, pdfOptions);

}

            curLayer.visible = false; // basic example

        } else {

            // --------------------------------------------

            // do something else if layer name not found

            alert ("Check layer name");

        }

    }

}

Thanks in advance

Simon