// the main function
var main = function () {
	var doc = app.activeDocument; // get the current document
	// loop the pages
	for (var i = 0; i < doc.pages.length; i++) {
		var page = doc.pages[i]; // isolate the page
		// loop all rectangles
		for (var j = 0; j < page.rectangles.length; j++) {
			var rect = page.rectangles[j]; // isolate a rectangle
			// test if there is an image inside
			if (rect.images.length > 0) {
				var image = rect.images[0]; // isolate the image
				// asign a random color from th swatches
				image.fillColor =
					doc.swatches[Math.floor(Math.random() * doc.swatches.length - 1)];
			} // end if image
		} // end loop j rectangles
	} // end loop i pages
}; // end of main
main(); // run it