isMouseWithin.js

gistfile1.txt

(function($){
window.util ={mousepos:{}};
//Constantly tracks mouse position
$(document).bind('mousemove.util', function(e){
	//adapted from http://www.quirksmode.org/js/events_properties.html
	if (!e) var e = window.event;
	if (e.pageX || e.pageY)		{
		util.mousepos.left = e.pageX;
		util.mousepos.top = e.pageY;
	}
	else if (e.clientX || e.clientY)	{
		util.mousepos.left = e.clientX + document.body.scrollLeft
			+ document.documentElement.scrollLeft;
		util.mousepos.top = e.clientY + document.body.scrollTop
			+ document.documentElement.scrollTop;
	}
});
util.isMouseWithin = function(selector){
	var $el = $(selector),
	    pos = $el.position(),
	    w = $el.outerWidth(),
	    h = $el.outerHeight();
	return util.mousepos.left > pos.left
		&& util.mousepos.left < pos.left + w 
		&& util.mousepos.top > pos.top
		&& util.mousepos.top < pos.top + h;
};
})(jQuery);//jQuery 1.0+

Created this for a hover augment which ended up being impractical. Saving for future use.