Not a good solution, Kasyan. If the stroke weight is already '1', it won't change!

Use this instead:

var doc = app.activeDocument;

for (var i = 0; i < doc.allPageItems.length; i++) {

    doc.allPageItems[i].strokeWeight += 1;

}

This will change the stroke weight of all frames, as was asked.

Good point, Jongware. I always have something to learn from you. Thanks.

var doc = app.activeDocument;
var color = doc.swatches.item("Anotada");
for (var i = 0; i < doc.allPageItems.length; i++) {
    if (doc.allPageItems[i].strokeColor == color) {
        doc.allPageItems[i].overprintStroke = true;
        doc.allPageItems[i].strokeWeight += 1;
    }
}

Let's enclose it with try-catch block:

var doc = app.activeDocument;
var color = doc.swatches.item("Anotada");
for (var i = 0; i < doc.allPageItems.length; i++) {
    try {
        if (doc.allPageItems[i].strokeColor == color) {
            doc.allPageItems[i].overprintStroke = true;
            doc.allPageItems[i].strokeWeight += 1;
        }
    }
    catch(err) {
        $.writeln(err.message + ", line: " + err.line);
    }
}

Hi everyone,

Could someone show me how change the stroke of selected page items?

Here's the code so far:

var change = app.selection;

for(var change=0;change<fx.length;change++){

     change[idt].strokeColor = "None";

     change[idt].strokeWeight = 0;

     }

Many thanks and best.

gr

Um, why are you asking a question and then supply a script that answers it?

Okay, it does not work. So what doesn't work?

(After trying) oh, it says this

Error Number: 55
Error String: Object does not support the property or method 'PageItem'

Your selection already is a page item (or it should be, when you selected just "objects"). Use this instead:

var change = app.selection; 
for(var idt=0;idt<change.length;idt++)
 {
  change[idt].strokeColor = "None";
  change[idt].strokeWeight = 0;
}

There is a slight over-kill here, because setting the stroke color to [None] will automatically set the weight to 0, but that's nothing dramatic.

Found out that removing the line;

change[idt].strokeWeight = 0;

will make it work properly.

Many thanks again JongWare!