[CSS] Use different CSS for Internet Explorer specific versions, with hacks for IE 6 7 8

Everybody knows about Internet Explorer Css issues.
There are some useful hacks in order to target the right version of IE

   1: body { 

   2: border:1px solid red; /* standard */

   3: border:1px solid blue\9; /* IE8 and below */

   4: *border:1px solid orange; /* IE7 and below */

   5: _border:1px solid blue; /* IE6 */