While most mobile devices will provide a widget for the date and time some desktop browsers may not. In that event enter the date as YYYY-MM--DD and time as HH:MM in 24 hour mode.
Note that you can also save your horoscope from your browser's File menu as Save Page As.
Be sure to check out the JyotishTools Blog for more tips on using the online horoscope.
Available Now! JyotishTools Pro for Android. Coming soon for Windows and iOS.
Details on the JyotishTools Home page.