I cannot get z-index
working on a iframe
that contains a pdf file with IE8. It works with Google Chrome.
Example (JSFiddle):
HTML
<div id="div-text">
<div id="shouldBeOnTop">my text that should be on top</div>
</div>
<div id="div-frame">
<iframe src="http://legallo1.free.fr/french/CV_JLG.pdf" width="200" height="200"/>
</div>
CSS
#div-text{
position:relative;
left:210px;
top:20px
}
#shouldBeOnTop{
position:relative;
right:60px;
background-color:red;
width:100px;
z-index:2;
}
#div-frame{
position:relative;
z-index:1;
}
Update: Matthew Wise has a really clever alternative solution which you should consider—especially if you're having trouble with my approach or dislike ugly hacks!
There is a way to cover windowed elements in IE with other elements, but you're not going to like it.
Legacy IE categorises elements into two types: windowed and windowless.
Regular elements like div
and input
are windowless. They are rendered by the browser itself in a single MSHTML plane and respect each other's z-order.
Elements rendered outside of MSHTML are windowed; for example, select
(rendered by the OS) and ActiveX controls. They respect each other's z-order, but occupy a separate MSHTML plane that is painted on top of all windowless elements.
The only exception is iframe
. In IE 5, iframe
was a windowed element. This was changed in IE 5.5; it is now a windowless element, but for backwards compatibility reasons it will still draw over windowed elements with a lower z-index
In other words: iframe
respects z-index for both windowed and windowless elements. If you position an iframe
over a windowed element, any windowless elements positioned over the iframe
will be visible!
The PDF will always be painted on top of the regular page content—like select
elements were until IE 7. The fix is to position another iframe
between your content and the PDF.
jsFiddle: http://jsfiddle.net/Jordan/gDuCE/
HTML:
<div id="outer">
<div id="inner">my text that should be on top</div>
<iframe class="cover" src="about:blank"></iframe>
</div>
<iframe id="pdf" src="http://legallo1.free.fr/french/CV_JLG.pdf" width="200" height="200"></iframe>
CSS:
#outer {
position: relative;
left: 150px;
top: 20px;
width: 100px;
z-index: 2;
}
#inner {
background: red;
}
.cover {
border: none;
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
z-index: -1;
}
#pdf {
position: relative;
z-index: 1;
}
This has been tested and should work in IE 7–9. If you feel persnickety about it showing up in the DOM for other browsers, you can add it with JavaScript or wrap it in an IE-only conditional comment:
<!--[if IE]><iframe class="cover" src="about:blank"></iframe><![endif]-->