I have some questions about focus in general (adhering to WC3 format, screw IE). I'm having problems with unintended actions occurring on a widget i am building (using the Dojo Toolkit), and i believe a better general understanding of focus will allow me to solve my problem myself, so here goes:
First of all, which common HTML element are and AREN'T focusable? I've been trying to throw focus around and it works sometimes, and doesnt work other times...
What is the 'highest' level focusable on a page? For instance, can i focus the window? The <body> tag? Specific to dojo, can you focus an entire widget? If the template is widgeted can you focus just highest level of the template (usually a <div>)?
Can focus be 'removed'? Can i remove focus from all elements/objects on the page until the next object is focused? Can i prevent a element from being focusable (like a button)?
What are all the methods through which i can affect focus? Besides calling the focus() method on elements, can focus be set through HTML attributes or in a CSS?
Thanks in advance for what i hope to be some great answers!