Links not clickable because of z-index

Question

I have a div with absolute position on a page which overlaps on another div when scrolling. I want to make it invisible when it scrolls to a specific div.

For that purpose, I'm using the z-index. I'm setting the z-index 1 of the div which I want to hide, and much higher z-index for the other div. However it does not hide the div. If I set the z-index to -1 then it hides but then the links on that div are no more clickable. How can I fix this?

Here's my code:

HTML:

<div class="wrap">
    <div class="up"><div class="box"><a href="#">Should hide</a></div></div>   
    <div class="down">Should be visible</div>
</div>

CSS:

.wrap{
    width: 300px;
    position: relative;
    overflow: hidden;
    border: 1px solid #000;

}
.up{
    height: 100px;   
}

.box{
    position: absolute;
    top: 20px;
    background: yellow;
    width: 100px;
    height: 100px;
    z-index: -1; 
}

.down{
    background: green;
    overflow: hidden;
    z-index: 200;
    height: 400px;
}

So the problem in above example is that the links in the .box are not clickable (because of -ve z-index value), and if I set it positive, it wont hide behind the .down.

JSFiddle: http://jsfiddle.net/G2xRA/

Answer 1

I had the same problem too. I solved it by changing the z-index values with a value greater than -1.

I made the front layer 2 and behind 1, so it worked.

Answer 2

In order for z-index's to go on top of each other you will both elements to have positioned.

A better description:

Definition and Usage

The z-index property specifies the stack order of an element.

An element with greater stack order is always in front of an element with a lower stack order.

Note: z-index only works on positioned elements (position:absolute, position:relative, or position:fixed).

So you will need:

.up {
    height: 100px;
    position: absolute;
}

Answer 3

Actually z-index only works with position so I gave the position:relative; to your .down class.

See the mentioned below CSS & DEMO.

.box{
        position: absolute;
        top: 20px;
        background: yellow;
        width: 100px;
        height: 100px;
        z-index: 1;  
    }

    .down {
        background: none repeat scroll 0 0 green;
        height: 400px;
        overflow: hidden;
        position: relative;
        z-index: 2;
    }

DEMO

Answer 4

.box{
    position: absolute;
    top: 20px;
    background: yellow;
    width: 100px;
    height: 100px;
    z-index: 1;  
}

.down{
    background: green;
    overflow: hidden;
    z-index: 2;
    height: 400px;
    position:relative;
}

Make these 2 changes in the classes. Z-index won't work in .down as you didn't put position. And, there is no need for the -ive z-index in .box. Z-index works like layers, an element with z-index 1 will be under any element that has higher z-index than 1. Ofcourse for this to work the elements need to be positioned.