@karenmpiekarski
Sorry for Jay. 
Was accidently!
Back to your question.
You can use the CONSOLE of —> for example in CHROME-BROWSER.
Press F-12 and navigate to → CONSEOLE.
And before you try to analyse some results in CONSOLE, first reset the console completely, because this example is already got so complex, so that there are also some unwanted bugs, which normaly should not throwing ERRORs, but they does. —> So first reset the console.