Need example PHP/HTML/JS code for constant synchronization with Google Calendar

Hi, We are looking for some example code to help us understand how to get constant synchronization access to google calendar WITHOUT asking the users of our website for their google's username and password. basically something like this: [login to view URL] What we need is an example php and html/js code that asks for authentication for google like in the example above, and after authentication, prints back to the screen the information of the events in the calendar - title, body content, location, time, etc. The script should then try every hour (using crontab?) to access the google calendar again, without asking again for authentication, and save the calendar events to a file. If you have any questions - please ask. thank you