Solution for failure to pin the z-index layer in IE6

In IE6, the z-index layer cannot be set to the top level. I discussed it with a few friends a few days ago and now I want to tell you the solution through fire.

The Layer Code is as follows:

<Div id = "ad_top"> </div> <div id = "topstory"> </div>

The style code is as follows:

. Ad_top {
Z-index: 999;
......
......
}
. Topstory {
Z-index:-999;
Float: left;
......
......
}

Final Solution:

Because the. topstory has a floating attribute that invalidates the z-index in this case, the solution is to remove the floating