Example of writing JSON-style info to a file

gistfile1.js

// ===========================================================================

try { (function() {
	if (!fw.selection || !fw.selection.length) {
		return;
	}
	
	var element = fw.selection[0],
		info = {
			name: element.name,
			x: element.left,
			y: element.top,
			w: element.width,
			h: element.height
		},
		filePath = fw.browseForFileURL("save"),
		file;
	
	if (!filePath) {
		return;
	}
	
	Files.deleteFileIfExisting(filePath);
	Files.createFile(filePath, "TEXT", "????");

	file = Files.open(filePath, true);
	file.write(info.toSource());
	file.close();
})(); } catch (exception) {
	if (exception.lineNumber) {
		alert([exception, exception.lineNumber, exception.fileName].join("\n"));
	} else {
		throw exception;
	}
}