Mért nem jó a CSS?

body{

backround-color;background:'#9ec8a3; /* Old browsers */

background: -moz-linear-gradient(top, #9ec8a3 0%, #54965d 16%, #54965d 23%); /* FF3.6+ */

background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#9ec8a3), color-stop(16%,#54965d), color-stop(23%,#54965d)); /* Chrome,Safari4+ */

background: -webkit-linear-gradient(top, #9ec8a3 0%,#54965d 16%,#54965d 23%); /* Chrome10+,Safari5.1+ */

background: -o-linear-gradient(top, #9ec8a3 0%,#54965d 16%,#54965d 23%); /* Opera 11.10+ */

background: -ms-linear-gradient(top, #9ec8a3 0%,#54965d 16%,#54965d 23%); /* IE10+ */

background: linear-gradient(to bottom, #9ec8a3 0%,#54965d 16%,#54965d 23%); /* W3C */

filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#9ec8a3', endColorstr='#54965d',GradientType=0 ); /* IE6-9 */

}