css3 Backgroound in gradient

In mostly in simple background gives this style 

 [background:#dddddd;]

In Mozilla browser use this css

[ background: -moz-linear-gradient(top, #ffffff 0%, #666666 100%); ]

In Chrome,Safari4+ browser use this css

[ background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffffff), color-stop(100%,#666666)); ] 

In Opera 11.10+ browser use this css

[ background: -o-linear-gradient(top, #ffffff 0%,#666666 100%); ] 

In IE10+ browser use this css

[ background: -ms-linear-gradient(top, #ffffff 0%,#666666 100%);]

 

In Default browser use this css