I'm having a strange problem positioning a set of divs inside another div. I think it will be best to describe it with an image:
Inside the black (#box) div there are two divs (.a, .b) that have to positioned in the same place. What I'm trying to achieve is pictured in the first image, second one is the effect I get. It looks like if the divs were floated without clearing or something, which is obviously not the case. Any ideas would be welcome!
Here's the code for this sample:
CSS:
#box {
background-color: #000;
position: relative;
padding: 10px;
width: 220px;
}
.a {
width: 210px;
position: absolute;
top: 10px;
left: 10px;
background-color: #fff;
padding: 5px;
}
.b {
width: 210px;
position: absolute;
top: 10px;
left: 10px;
background-color: red;
padding: 5px;
}
#after {
background-color: yellow;
padding: 10px;
width: 220px;
}
HTML:
<div id="box">
<div class="a">Lorem</div>
<div class="b">Lorem</div>
</div>
<div id="after">Hello world</div>
This question is related to
css
positioning
The answer is
One of #a or #b needs to be not position:absolute, so that #box will grow to accommodate it.
So you can stop #a from being position:absolute, and still position #b over the top of it, like this:
#box {_x000D_
background-color: #000;_x000D_
position: relative; _x000D_
padding: 10px;_x000D_
width: 220px;_x000D_
}_x000D_
_x000D_
.a {_x000D_
width: 210px;_x000D_
background-color: #fff;_x000D_
padding: 5px;_x000D_
}_x000D_
_x000D_
.b {_x000D_
width: 100px; /* So you can see the other one */_x000D_
position: absolute;_x000D_
top: 10px; left: 10px;_x000D_
background-color: red;_x000D_
padding: 5px;_x000D_
}_x000D_
_x000D_
#after {_x000D_
background-color: yellow;_x000D_
padding: 10px;_x000D_
width: 220px;_x000D_
} <div id="box">_x000D_
<div class="a">Lorem</div>_x000D_
<div class="b">Lorem</div>_x000D_
</div>_x000D_
<div id="after">Hello world</div>(Note that I've made the widths different, so you can see one behind the other.)
Edit after Justine's comment: Then your only option is to specify the height of #box. This:
#box {
/* ... */
height: 30px;
}
works perfectly, assuming the heights of a and b are fixed. Note that you'll need to put IE into standards mode by adding a doctype at the top of your HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
before that works properly.
- First all block level elements are postioned static to the 'document'. The default positioning for all elements is
position: static, which means the element is not positioned and occurs where it normally would in the document. Normally you wouldn't specify this unless you needed to override a positioning that had been previously set. - Relative position: If you specify
position: relative, then you can use top or bottom, and left or right to move the element relative to where it would normally occur in the document. - When you specify
position: absolute, the element is removed from the document and placed exactly where you tell it to go.
So in regard to your question you should position the containing block relative, i.e:
#parent {
position: relative;
}
And the child element you should position absolute to the parent element like this:
#child {
position: absolute;
}
The problem is described (among other) in this article.
#box is relatively positioned, which makes it part of the "flow" of the page. Your other divs are absolutely positioned, so they are removed from the page's "flow".
Page flow means that the positioning of an element effects other elements in the flow.
In other words, as #box now sees the dom, .a and .b are no longer "inside" #box.
To fix this, you would want to make everything relative, or everything absolute.
One way would be:
.a {
position:relative;
margin-top:10px;
margin-left:10px;
background-color:red;
width:210px;
padding: 5px;
}
Source: Stackoverflow.com