CSS+JS 弹出窗口

需要引入样式

.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: 25%;  left: 35%;  width: 30%;  height: 50%;  padding-top: 20px;padding-left:40px;  border: 1px solid orange;  background-color: white;  z-index:1002;  overflow: auto;  }

页面中的内容

<div onclick="javascript:document.getElementById('light').style.display='block';document.getElementById('fade').style.display='block'">点击这里弹出窗口</div>

<div id="light" class="white_content">

    <div style="width:100%;height:20px;"><img src="关闭弹出窗口图片"     style="float:right;margin-right:10px" onclick="javascript:document.getElementById         ('light').style.display='none';document.getElementById('fade').style.display='none'"/></div>

    弹出窗口内容

</div>

 <div id="fade" class="black_overlay">弹出窗口灰色背景</div>