我从 css graident generator 得到这段代码,它在渐变的底部是透明的
background: -moz-linear-gradient(top, rgba(248,246,247,1) 0%, rgba(248,246,247,0) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(248,246,247,1)), color-stop(100%,rgba(248,246,247,0))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(248,246,247,1) 0%,rgba(248,246,247,0) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(248,246,247,1) 0%,rgba(248,246,247,0) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(248,246,247,1) 0%,rgba(248,246,247,0) 100%); /* IE10+ */
background: linear-gradient(to bottom, rgba(248,246,247,1) 0%,rgba(248,246,247,0) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f8f6f7', endColorstr='#00f8f6f7',GradientType=0 ); /* IE6-9 */
现在我想在渐变背景上添加一个背景
background: url('../images/letter_head.png') left top repeat-x, #f8f6f6;
我如何将它们结合起来?