Css Course

Yin-Yang circle created with a DIV tag and CSS properties (without image file).
Code:
<style type="text/css">
#yinyang {
 width: 100px; height: 50px;
 background: #fff;
 border-color: #000;
 border-style: solid;
 border-width: 2px 2px 50px 2px;
 border-radius: 100%;
 position: relative;
}
#yinyang:before {
 content: "";
 position: absolute;
 top: 50%;
 left: 0;
 background: #fff;
 border: 18px solid #000;
 border-radius: 100%;
 width: 14px;
 height: 14px;
}
#yinyang:after {
 content: "";
 position: absolute;
 top: 50%;
 left: 50%;
 background: #000;
 border: 18px solid #fff;
 border-radius:100%;
 width: 14px;
 height: 14px;
}
</style>

<div id="yinyang"></div>
Demo:
 

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which HTML5 tag is indicated to be used as container for menu with navigation links in Web site?
<section> <nav> <article>
<nav><ul>
 <li><a href="http://coursesweb.net/css/" title="CSS Course">CSS Course</a></li>
 <li><a href="http://www.marplo.net/jocuri/" title="Flash Games">Flash Games</a></li>
</ul></nav>
Which CSS property shifts an item horizontally to the left or right of where it was?
text-align clear float
.some_class {
  width: 30%;
  float: left;
}
Click on the Math object method which returns x, rounded downwards to the nearest integer.
Math.ceil(x) Math.abs(x) Math.floor(x)
var num = 12.34567;
num = Math.floor(num);
alert(num);       // 12
Indicate the PHP function which returns the number of characters in string.
mb_strlen() count() stristr()
$str = "string with utf-8 chars åèö";
$nrchr = mb_strlen($str);
echo $nrchr;        // 30
Yin-Yang with CSS

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