Rounded corners in CSS

There are other ways that I’ve seen it done, but the other methods always require lots of complex HTML and CSS. I figure that lots of nested divs aren’t much better than using a table, so my way doesn’t require much in the way of HTML or CSS. Here’s how I do it.

Create four images for your corners. Most graphics programs have a tool that will create rounded-off squares. I’ll be using this square here…

…and I’m going to cut off the corners to get my four images:

In the spot where I want the box to show up, I create a container div to hold the box, a div for the top row and a div for the bottom row. Between the top and bottom rows, I add my content. In the top and bottom row divs, I add the left corner image and set the inline style to read display: none;. This makes the image invisible unless I make it visible through the stylesheet. That way, I can hide the effect from incompatible browsers by not showing them the stylesheet.

<div class="roundcont">
   <div class="roundtop">
	 <img src="tl.gif" alt=""
	 width="15" height="15" class="corner"
	 style="display: none" />
   </div>

<p>Lorem ipsum dolor sit amet, consectetur adipisicing
   elit, sed do eiusmod tempor incididunt ut labore et
   dolore magna aliqua. Ut enim ad minim veniam, quis
   nostrud exercitation ullamco laboris nisi ut aliquip
   ex ea commodo consequat. Duis aute irure dolor in
   reprehenderit in voluptate velit esse cillum dolore eu
   fugiat nulla pariatur. Excepteur sint occaecat cupidatat
   non proident, sunt in culpa qui officia deserunt mollit
   anim id est laborum.</p>

<div class="roundbottom">
	 <img src="bl.gif" alt=""
	 width="15" height="15" class="corner"
	 style="display: none" />
   </div>
</div>

The CSS sets the width and background color of the container object and the color of the text inside. The margins on interior paragraphs are set so that the text doesn’t sit right up against the edge of the box.

Then the top and bottom divs are given a background image that contains the right corner images and the left corner images from the HTML code are enabled.

.roundcont {
	width: 250px;
	background-color: #f90;
	color: #fff;
}

.roundcont p {
	margin: 0 10px;
}

.roundtop {
	background: url(tr.gif) no-repeat top right;
}

.roundbottom {
	background: url(br.gif) no-repeat top right;
}

img.corner {
   width: 15px;
   height: 15px;
   border: none;
   display: block !important;
}