Adds keyboard shortcuts to display available HTML Access Keys, if the websites provide them.
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This script is used to find out which link, button, or form field elements have Access Keys, and what key is assigned for each of them.
When the keyboard focus is not on a text form field...
If CTRL key is held down, for each element with Access Key, the assigned key will be displayed on that element.
If ALT key is also held down when CTRL is held down, a list of Access Keys and their associated element information will be displayed.
In Firefox web browser, Access Key can be accessed by pressing SHIFT+ALT+<AccessKey>.
In Chrome web browser, Access Key can be accessed by pressing ALT+<AccessKey>, or SHIFT+ALT+<AccessKey>.
For more information about Access Key and how to access it in other web browsers, see below page.
https://en.wikipedia.org/wiki/Access_key
