浮动div中的绝对定位图像

Question

I have a top bar and the links are set using float.In one of the links i have a floated div.In that div i want to show a absolute positioned image.I am using absolute because i do not want to show the full image only a part of it will be displayed.this is achieved by using top and left as

CSS

div.cont{
    max-width:50px;
    min-width:50px;
    height:50px;
    overflow:hidden;
}
img{
    position:absolute;
    width:100px;
    height:100px;
    top:-10px;
    left:-15px;
}

HTML

<div style="float:right;">
    <div class="cont">
        <img src="image url"/>
   </div>
</div>

But as image is absolute positioned it is shown outside that div.

How can overcome this and show the image in div?

Thanks in advance.

Answer 1

Set the position on the parent div:

div.cont{
      max-width:50px;
      min-width:50px;
      height:50px;
      overflow:hidden;
      position:relative;
}

When you position something absolutely, it's positioned relative to the next positioned ancestor. If you don't specify the positioning then the ancestor will be the body.

Answer 2

By default, absolutely positioned elements are positioned relative to the viewport. Add position: relative to your floated div. This will position the image inside relative to its parent, rather than relative to the viewport.

Answer 3

在img上使用margin-top和margin-left而不是left:和top：`。