Hover button state on touchable area (iPad)
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I'd like to find the general solution for hovering effect on buttons like native iOS and browser buttons when button changing view if I press it. In my case the buttons are <img> or <a> tags. When I press button it should be changed to pressed button state. Also if I touched screen  outside of the button and move finger into button the button's state should be changed to pressed. And vise versa.
Any solutions or hints?