CSS实现 全屏 遮罩

CSS实现 全屏 遮罩

 

遮罩 CSS:.divBG {     background: gray;     position: fixed;     left: 0px;     top: 0px;     width: 100%;     height: 100%;     display: none;     z-index: 20;     filter: alpha(opacity=60);     opacity: 0.5 !important; }

 

弹出层 CSS:.PopUp {     position: fixed;     display: none;     z-index: 50 !important;     background-color: White;     width: 900px;     border-style: solid solid solid solid;     border-width: 5px 5px 5px 5px;     border-color: #cccc99;     left: 50%;     top: 50%;     margin-top: -200px; /*--高度的一半--*/     margin-left: -450px; /*--宽度的一半--*/ }