Спасибо @ deceze,
Я пишу образец CSS для других людей с таким же требованием
top:0px;
opacity: 0.6;
width: 1944px;
height: 896px;
position: absolute;
z-index: 500;
background-color:#dcdcdc;
/* For WebKit (Safari, Google Chrome etc) */
background: -webkit-gradient(linear, left top, left bottom, from(#dcdcdc), to(rgba(215,212,207,0)));
/* For Mozilla/Gecko (Firefox etc) */
background: -moz-linear-gradient(top, #dcdcdc, rgba(215,212,207,0));
/* For Internet Explorer 5.5 - 7 */
filter:alpha(Opacity=70, FinishOpacity=0, Style=1, StartX=1242, StartY=0, FinishX=1242, FinishY=696);
/* For Internet Explorer 8 */
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=70, FinishOpacity=0, Style=1, StartX=1242, StartY=0, FinishX=1242, FinishY=696)";