Ever wanted to detect when the user is watching a specific element in your DOM-tree? Well, now you can – With jQuery Bullseye. This is a versatile & lightweight plug-in for jQuery that adds enterviewport and leaveviewport events to elements.
This is a simple (351 bytes gzipped) jQuery plugin that transforms regular HTML-containers, such as divs, into clickable elements that acts almost as an anchor; with support for status bar information, focus/blur, target (_blank etc.) and more.