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Why does my overlay cover some elements but not all?

I am trying to create my own, modal dialog using divs:

html:
<div id="overlay"> </div>    
<div id="popup">  

    <input type="submit"/>
    <p>Some text</p>

</div>

css:
#overlay{
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0px;
    top: 0px;
    background-color:#000;
    opacity: .75;
    z-index: -1;
}

#popup {
    position: absolute;
    text-align:center;
    z-index: 1000;
}

http://jsfiddle.net/wfsaxton/fq7mhefa/

I'm not sure why, but my overlay not only closes the page, but also closes part of the popup (background and text). I only want it to close the page in the background ... the popup should be completely above the overlay.

Any ideas what might be going on?

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4 answers 


#overlay{
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0px;
    top: 0px;
    background-color:#000;
    opacity: .75;
    z-index: 5;
}

.popup {
    display: none;
    position: absolute;
    text-align:center;
    z-index: ;
}
      

        
        
        
      

    
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    <div id="underlay">  
        <input type="submit"/>
        <p>Some text</p>
    </div>

<div id="overlay">  
    <div id="popup">  
        <input type="submit"/>
        <p>Some text</p>
    </div>
</div>
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You set your overlay to -1, which means it is below the default z-index: 0 for almost every html element.

+3


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to overlay everything, the z-index

value must be greater than everything else. yours -1

.



+2


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You need to change the z-index of the overlay and popup.

You can specify #overlay z-index from 5 and .popup z-index -1 (or whatever numbers you want to use). Then you should be good to go.

0


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Uh, it was that simple. My #popup didn't have a highlighted background, so it was transparent by default in my opinion.

Just added:

#popup {
    ....
    background-color: white;
}

And now it works: http://jsfiddle.net/wfsaxton/fq7mhefa/12/

0


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