November 14th, 2012, 02:48 PM
Join Date: Feb 2011
Location: Orange County
Device(s): Google/Asus Nexus 7
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Think of a function as a mini-program that works when it is triggered to start. For instance, you can have a function that tells the app to return to the previous page. But it doesn't actually take place until the user touches a Back button.
This is a function called goBack(), which tells the app to go back to the previous page:
On a page, this Back button is all set to call, or execute, the goBack() function:
<input type='button' value='Back' onclick='goBack()'>
Hope this little example helps you understand functions.