How do I center the div vertically?
Possible Duplicate:
What's The Best Way of Centering a Div Vertically with CSS
.title_text_only{
position:absolute;
width:100%;
display:none;
z-index:9;
top:50%;
bottom:50%;
text-align:center;
color:#fff;
font-size:18px;
text-shadow: 1px 1px 1px #666;
}
Right now, it doesn't seem to work. top 50% doesn't center it vertically. It's a little to the bottom. It's as if the top border is 50%.
If you can specify the height of the box, you can use margin-top: -[height / 2]px (fill in [height / 2] and note that most browsers will round fractional pixels up at 100% zoom).
If you can specify the height of its parent, you can do something like this:
parent {
height: [height]px;
}
child {
/* Make the element part of the inline flow, as vertical-align isn't supported on block elements */
display: -moz-inline-box; /* Old Firefox doesn't support inline-block */
display: inline-block;
/* IE < 8 doesn't support inline-block on native block-level elements */
*display: inline;
*zoom: 1;
/* The interesting bit */
line-height: [height]px;
vertical-align: middle;
}
If the content of the child is expected to wrap onto multiple lines, you can wrap it in a sub-child that resets the line-height .
如何垂直居中所有浏览器的div？
top: 50%; does exactly what you suspect: it places the top edge at 50% height. You can offset this effect by also applying a negative vertical margin equal to half of the height of the element. For example, if the element was 100px high, you would add this property:
margin-top: -50px;
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