クロムのような他のブロワーはうまく表示されます。IE9は、画像のないグラデーションを表示するだけです。
CSSをコーディングする
body {
background:
url('../images/adventure/background.png')
background: url('../images/adventure/background.png'), -moz-linear-gradient(top, rgba(255,255,255,0) 0%, rgba(255,255,255,0.4) 40%, rgba(149,147,160,1) 100%); /* FF3.6+ */
background: url('../images/adventure/background.png'), -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,0)), color-stop(40%,rgba(255,255,255,0.4)), color-stop(100%,rgba(149,147,160,1))); /* Chrome,Safari4+ */
background: url('../images/adventure/background.png'), -webkit-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(255,255,255,0.4) 40%,rgba(149,147,160,1) 100%); /* Chrome10+,Safari5.1+ */
background: url('../images/adventure/background.png'), -o-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(255,255,255,0.4) 40%,rgba(149,147,160,1) 100%); /* Opera 11.10+ */
background: url('../images/adventure/background.png'), -ms-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(255,255,255,0.4) 40%,rgba(149,147,160,1) 100%); /* IE10+ */
background: url('../images/adventure/background.png'), linear-gradient(top, rgba(255,255,255,0) 0%,rgba(255,255,255,0.4) 40%,rgba(149,147,160,1) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00ffffff', endColorstr='#9593a0',GradientType=0 ); /* IE6-8 */