<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> <title>css hack</title> <style type="text/css"> .demo{100px;height:100px;border:5px solid orange;} .demo1{ background:black; /* for all */ } .demo2{ background:green\9; /* for ie */ } .demo3{ background:yellow\0; /* for ie8 */ } .demo4{ *background:blue; /* for ie7,ie6 */ } .demo5{ _background:red; /* for ie6 */ } </style> </head> <body> <div class="demo demo1"></div><br/> <div class="demo demo2"></div><br/> <div class="demo demo3"></div><br/> <div class="demo demo4"></div><br/> <div class="demo demo5"></div> </body> </html>