// Returns the coordinates of the two points defining the position of container e
function getRect(e){
	var eo = $(e).cumulativeOffset(); // element offsets
	return {top: eo.top,
			left: eo.left,
			bottom: eo.top + $(e).getHeight(),
			right: eo.left + $(e).getWidth()};
}
function inViewport(e){
	// NOTE: Methods on document.viewport need a proper DOCTYPE cause browsers' quirks mode
	// actually breaks the box model.
	var myCoors = getRect(e);
	console.log(myCoors);
	var so = document.viewport.getScrollOffsets();
	var a = document.viewport.getHeight() + so.top;
	var	b = document.viewport.getWidth() + so.left;
	var	cond1 = (a > myCoors.bottom) && (b > myCoors.right);
	var	cond2 = (myCoors.top > so.top) && (myCoors.left > so.left);
	return (cond1 && cond2);
}