Fixed gradient background with css

html {min-height: 100%}
body {min-height: 100%}
#background {
  background: #1e5799;
  background: -moz-linear-gradient(top,  #1e5799 0%, #7db9e8 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#1e5799), color-stop(100%,#7db9e8));
  background: -webkit-linear-gradient(top,  #1e5799 0%,#7db9e8 100%);
  background: -o-linear-gradient(top,  #1e5799 0%,#7db9e8 100%);
  background: -ms-linear-gradient(top,  #1e5799 0%,#7db9e8 100%);
  background: linear-gradient(to bottom,  #1e5799 0%,#7db9e8 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1e5799', endColorstr='#7db9e8',GradientType=0 );
  background-attachment: fixed;
}