Hi all, browser compatibility one of the most complicated issue we face during our development. So whenever i get into problem, go and search on internet. Here, I like to share Paul Irish. /***** Selector Hacks ******//* IE6 and below */* html #uno { color: red }/* IE7 */*:first-child+html #dos { color: red }/* IE7, FF, Saf, Opera */html>body #tres { color: red }/* IE8, FF, Saf, Opera (Everything but IE 6,7) */html>/**/body #cuatro { color: red }/* Opera 9.27 and below, safari 2 */html:first-child #cinco { color: red }/* Safari 2-3 */html[xmlns*=””] body:last-child #seis { color: red }/* safari 3+, chrome 1+, opera9+, ff 3.5+ */body:nth-of-type(1) #siete { color: red }/* safari 3+, chrome 1+, opera9+, ff 3.5+ */body:first-of-type[…]