跨浏览器的遮罩层透明度

跨浏览器的遮罩层透明度

css 样式:

background-color: rgba(255, 255, 255, 0.5);
	filter: alpha(opacity =   30);
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=30)";

 遮罩div的全部样式:

#loadPanel {
	overflow-y: auto;
	overflow-x: auto;
	width: 100%;
	top: 97px;
	left: 0px;
	position: absolute;
	background-color: rgba(255, 255, 255, 0.5);
	filter: alpha(opacity =   30);
	/*opacity: .3;*/
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=30)";
	z-index: 99999;
	/*background-image: url("../images/loading.gif");*/
	background-repeat: no-repeat;
    background-position-x: center;
    -moz-background-position-x: center;
    -ms-background-position-x: center;
	background-position-y: center;
    -moz-background-position-y: center;
    -ms-background-position-y: center;
	background-attachment: fixed;/* 使背景图片相当于可视区域 */
}