How to detect elements overlapping (overlaying) using JavaScript?

Question

How to detect overlap HTML elements, using JavaScript?

I have an item list (

). It slides up and down using JavaScript. When it slides down, de

Answer 1

Why not just raise the z-index of your UL to be above the div at the bottom?

add:

#wrap {
    z-index  : 2;
    position : relative;
}