html {
    padding: 0;
    margin: 0;
}

body {
    display: block;
    position: absolute;
    height: auto;
    bottom: 0;
    top: 0;
    left: 0;
    right: 0;
    margin: 0;
    background-color: black;
    overflow: auto;
    min-width: 320px;
    min-height: 490px;
   
    font-family: Tahoma,Arial, "微软雅黑","黑体","微軟正黑體";
    font-size: 1.5em;
}


  .black_overlay{  
            display: none; 
            position: absolute; 
            top: 0%; 
            left: 0%; 
            width: 100%; 
            height: 100%; 
            background-color: #000; 
            z-index:1001; 
            -moz-opacity: 0.8; 
            opacity:.20; 
            filter: alpha(opacity=40); 
        } 
        .white_content {   
            display: none; 
            position: absolute; 
            top: 20%; 
            left: 18%; 
            width: 60%; 
            height: 80%; 
            padding: 5px; 
            border: 2px solid #486; 
            background-color: white; 
            z-index:1002; 
            overflow: hidden; 
        } 
        .close{
            float:right;
            color:#999;
            padding:5px;
            margin:-2px -5px -5px;
            font:bold 14px/14px simsun;
            text-shadow:0 1px 0 #ddd
        }