Creating Angled Corners with Transparent Background Images
This series of instructive tutorials shows you how to build rounded and angled corners, as well as other eye-catching effects by utilizing a few basic transparent background images. These images can be easily applied to any web page element in order to improve its look and feel and make it more attractive to the users of a given web site.
Creating Angled Corners with Transparent Background Images - Review: building rounded corners by using a transparent background image (Page 2 of 4 )
Before I proceed to demonstrate how to build some appealing angled corners for certain elements of a sample web page, I’d like to list the complete source code corresponding to the hands-on example that you learned in the previous tutorial of the series. As you’ll certainly recall, it was created to display some basic rounded corners on all of the <h2> headers contained in a primitive web page.
The CSS styles and structural markup of the web page in question were initially defined in the following way:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Sample web page with rounded corners (transparent background image)</title>
background: #6cf url(rounded_corners_transp.gif) center center no-repeat;
font: bold 12px Arial, Helvetica, sans-serif;
color: #000;
}
p{
font: normal 12px Arial, Helvetica, sans-serif;
color: #000;
}
#header{
width: 780px;
padding: 10px;
margin-left: auto;
margin-right: auto;
background: #ffc;
}
#navbar{
width: 780px;
padding: 10px;
margin-left: auto;
margin-right: auto;
background: #fff;
}
#navbar ul{
list-style: none;
}
#navbar li{
display: inline;
padding-right: 4%;
}
#navbar a:link,#navbar a:visited{
font: normal 12px Arial, Helvetica, sans-serif;
color: #039;
text-decoration: none;
}
#navbar a:hover{
text-decoration: underline;
}
#mainwrapper{
clear: both;
width: 800px;
height: 100%;
margin-left: auto;
margin-right: auto;
overflow: hidden;
background: #fff;
}
#mainwrapper .leftcol{
position: relative;
float: left;
}
#mainwrapper .rightcol{
position: relative;
float: right;
}
#leftbar{
width: 180px;
padding: 10px;
}
#centerbar{
float: left;
width: 380px;
padding: 10px;
background: #fff;
}
#rightbar{
width: 180px;
padding: 10px;
}
#footer{
clear: both;
width: 780px;
padding: 10px;
margin-left: auto;
margin-right: auto;
background: #ffc;
}
.contbox{
padding: 10px;
background: #6cf;
}
</style>
</head>
<body>
<div id="header">
<h1>This is the header section of the web page</h1>
<p>Contents for header section go here. Contents for header section go here. Contents for header section go here. Contents for header section go here.</p>
</div>
<div id="navbar">
<h1>This is the navigation bar of the web page</h1>
<ul>
<li><a href="#">Link 1</a></li>
<li><a href="#">Link 2</a></li>
<li><a href="#">Link 3</a></li>
<li><a href="#">Link 4</a></li>
<li><a href="#">Link 5</a></li>
<li><a href="#">Link 6</a></li>
</ul>
</div>
<div id="mainwrapper">
<div id="leftbar" class="leftcol">
<h2>Left column of the web page</h2>
<div class="contbox">
<p>Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here.</p>
</div>
</div>
<div id="centerbar" class="leftcol">
<h1>Center column of the web page</h1>
<p>Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here.</p>
<p>Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here.</p>
<p>Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here. Contents for center column go here.</p>
</div>
<div id="rightbar" class="rightcol">
<h2>Right column of the web page</h2>
<div class="contbox">
<p>Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here. Contents for left column go here.</p>
</div>
</div>
</div>
<div id="footer">
<h1>This is the footer section of the web page</h1>
<p>Contents for footer section go here. Contents for footer section go here. Contents for footer section go here. Contents for footer section go here. Contents for footer section go here.</p>
</div>
</body>
</html>
As you can see, the CSS styles of the above (X)HTML file includes the following declaration:
h2{
padding: 7px 5px 8px 5px;
margin: 0;
background: #6cf url(rounded_corners_transp.gif) center center no-repeat;
font: bold 12px Arial, Helvetica, sans-serif;
color: #000;
}
Naturally, this CSS style is the one that actually assigns the “rounded_corners_transp.gif” image to all of the previous <h2> web page headers. The image in question, for the sake of clarity, originally looked like this:
And finally, here’s the final appearance of one of the main containers included into the pertinent web page, after styling it with the aforementioned transparent background image:
Well, at this point you certainly recalled how to build some basic rounded corners by utilizing a unique transparent GIF. So considering this, it’s time to move on and see how to implement this same approach in order to create a few simple angled corners logically using the sample web page that was shown before.
To see how this web page effect will be achieved, please click on the link below and keep reading.
Style Sheets 
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Building Corner Effects with Transparent Background Images
