Relink images

I don't know how to Relink images. But I know how to get fullpath of placing images, and how to place Images in rectangles.

We can collect Images filepath,

app.activeDocument.rectangles[0].epss[0].properties.itemLink.filePath

If you only change filenames extension, you can replace the EPS images, and other properties can keep before replace Images.

for (var i=0;i<app.activeDocument.rectangles.length;i++) {
    if (app.activeDocument.rectangles.epss.length>0){
        var n = app.activeDocument.rectangles.epss[0].properties.itemLink.filePath;
        var f = File (n);
        app.activeDocument.rectangles.place(f);
        }
    }

Though it only has to be useful...