I've seen answers suggesting just display:none
on the :hover
css. But that makes the div flicker when the mouse is moving.
EDIT: Added jsfiddle
display:none
will take the element out of the render tree, so it loses :hover
state immediately, then reappears and gets :hover
again, disappears, reappears, etc...
What you need is:
#elem { opacity:0; filter:alpha(opacity=0); }
It will leave the place empty, so no flickering will appear. (Demo or yours updated)