另外，还需要设置该页面所使用CSS样式。lightbox.css样式表文件代码如下所示：
#lightbox {
      BORDER-RIGHT: #fff 1px solid;
      BORDER-TOP: #fff 1px solid;
       DISPLAY: none;
       Z-INDEX: 9999;
       BACKGROUND: #fdfce9;
       LEFT: 50%;
       MARGIN: -220px 0px 0px -250px;
       BORDER-LEFT: #fff 1px solid;
       WIDTH: 500px;
       BORDER-BOTTOM: #fff 1px solid;
       POSITION: absolute;
       TOP: 50%;
       HEIGHT: 400px;
       TEXT-ALIGN: left
}
UNKNOWN {
     POSITION: fixed
}
#overlay {
      DISPLAY: none;
      Z-INDEX: 5000; FILTER: alpha(opacity=80);
      LEFT: 0px;
      WIDTH: 100%;
      POSITION: absolute;
      TOP: 0px;
      HEIGHT: 100%;
      BACKGROUND-COLOR: #000; moz-opacity: 0.8; opacity: .80
}
UNKNOWN {
    POSITION: fixed
}
.done#lightbox #lbLoadMessage {
      DISPLAY: none
}
.done#lightbox #lbContent {
      DISPLAY: block
}
.loading#lightbox #lbContent {
      DISPLAY: none
}
.loading#lightbox #lbLoadMessage {
       DISPLAY: block
}
.done#lightbox IMG {
      WIDTH: 100%; HEIGHT: 100%
}
客户端脚本
由于浏览器对图层的支持不同，所以首先要确定客户端浏览器的类型。以下代码可用于判断客户端的浏览器和操作系统。
var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

function getBrowserInfo() {
       if (checkIt('konqueror')) {
            browser = "Konqueror";
            OS = "Linux";
       }
       else if (checkIt('safari')) browser = "Safari"
       else if (checkIt('omniWeb')) browser = "OmniWeb"
       else if (checkIt('opera')) browser = "Opera"
       else if (checkIt('Webtv')) browser = "WebTV";
       else if (checkIt('icab')) browser = "iCab"
       else if (checkIt('msie')) browser = "Internet Explorer"
       else if (!checkIt('compatible')) {
             browser = "Netscape Navigator"
            version = detect.charAt(8);
       }
       else browser = "An unknown browser";