setStyle = function(popover, display, top, left) {
		var style = popover.style;
		if (typeof display !== 'undefined')
			style.display = display;
		if (typeof top !== 'undefined')
			style.top = top + 'px';
		if (typeof left !== 'undefined')
			style.left = left + 'px';
	}
segmented-controllers
@param {type} $
@param {type} window
@param {type} document
@param {type} undefined
@returns {undefined}