Clear float without extra tag with CSS

CSS for all browsers  --------------------------------------------


.clearfix:before,
.clearfix:after {
  display: table;
  line-height: 0;
  content: " ";
}

.clearfix:after {
  clear: both;
}

CSS for IE 6, 7 ----------------------------------------------

 .clearfix {

    *zoom: 1;     /* triggers hasLayout */

    display: block;     /* resets display for IE/Win */

 }  

HTML (For IE 6,7)--------------------------------------------

<!--[if lte IE 7]>

<link href="css/ie.css" rel="stylesheet" type="text/css" />

<![endif]-->

IE 6 ,7 8 CSS hacks

body {
 color: red; /* all browsers, of course */
 color : green\9; /* IE8 and below */
 *color : yellow; /* IE7 and below */
 _color : orange; /* IE6 */
}

Conditional comments of IE

<p><!--[if IE]>
According to the conditional comment this is Internet Explorer<br />
<![endif]-->

<!--[if IE 5]>
According to the conditional comment this is Internet Explorer 5<br />
<![endif]-->

<!--[if IE 5.0]>
According to the conditional comment this is Internet Explorer 5.0<br />
<![endif]-->

<!--[if IE 5.5]>
According to the conditional comment this is Internet Explorer 5.5<br />
<![endif]-->

<!--[if IE 6]>
According to the conditional comment this is Internet Explorer 6<br />
<![endif]-->

<!--[if IE 7]>
According to the conditional comment this is Internet Explorer 7<br />
<![endif]-->

</p>

Taking your detection further

Operators is what CC relies on to determine it course of action. We saw above how one operator, "!", is used to negate the browser version to detect. In fact CC supports a handful of other operators, which we shall list and then explain:

Operators supported by CC

Operator syntax	Description
!	The "not" operator.
lt	The "less than" operator.
lte	The "less than or equal to" operator.
gt	The "greater than" operator.
gte	The "greater than or equal to" operator

With the above operators more generic detection of browsers such as IE6+ (which encompasses IE6, IE6.1, IE7, and so on) becomes possible. For example:

<!--[if gte IE 6]>
You are using IE 6+
<![endif]-->