简单清晰的弹出层
<html><head><title>LIGHTBOX EXAMPLE</title><style> .black_overlay{display: none;position: absolute;top: 0%;left: 0%;width: 100%;height: 100%;background-color: black;z-index:1001;-moz-opacity: 0.8;opacity:.80;filter: alpha(opacity=80);}.white_content {display: none;position: absolute;top: 30%;left: 30%;width: 40%;height: 40%;padding: 16px;border: 16px solid orange;background-color: white;z-index:1002;overflow: auto;}</style></head><body><p> 可以根据自己要求修改css样式<a href = "javascript:void(0)" onclick = "document.getElementById('light').style.display='block'; document.getElementById('fade').style.display='block'">点击这里打开窗口</a></p><div id="light" onclick = "document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'">Close</a></div><div id="fade" class="black_overlay"></div></body></html>