JS弹出消息提示层，绝对屏幕居中和背景变暗(仿windows关机效果)!DOCTYPE html PUBLIC -//W3C//DTD XHTML
JS弹出消息提示层，绝对屏幕居中和背景变暗(仿windows关机效果)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">/*弹出层的STYLE*/html,body {height:100%; margin:0px; font-size:12px;}.mydiv {background-color: #ff6;border: 1px solid #f90;text-align: center;line-height: 40px;font-size: 12px;font-weight: bold;z-index:99;width: 300px;height: 120px;left:50%;/*FF IE7*/top: 50%;/*FF IE7*/margin-left:-150px!important;/*FF IE7 该值为本身宽的一半 */margin-top:-60px!important;/*FF IE7 该值为本身高的一半*/margin-top:0px;position:fixed!important;/*FF IE7*/position:absolute;/*IE6*/_top: expression(eval(document.compatMode &&document.compatMode=='CSS1Compat') ?documentElement.scrollTop + (document.documentElement.clientHeight-this.offsetHeight)/2 :/*IE6*/document.body.scrollTop + (document.body.clientHeight - this.clientHeight)/2);/*IE5 IE5.5*/}.bg {background-color: #ccc;width: 100%;height: 100%;left:0;top:0;/*FF IE7*/filter:alpha(opacity=50);/*IE*/opacity:0.5;/*FF*/z-index:1;position:fixed!important;/*FF IE7*/position:absolute;/*IE6*/_top: expression(eval(document.compatMode &&document.compatMode=='CSS1Compat') ?documentElement.scrollTop + (document.documentElement.clientHeight-this.offsetHeight)/2 :/*IE6*/document.body.scrollTop + (document.body.clientHeight - this.clientHeight)/2);/*IE5 IE5.5*/}/*The END*/</style><script type="text/javascript">function showDiv(){document.getElementById('popDiv').style.display='block';document.getElementById('bg').style.display='block';}function closeDiv(){document.getElementById('popDiv').style.display='none';document.getElementById('bg').style.display='none';}</script></head><body><div style="padding-top: 20px;"><input type="Submit" name="" value="显示层" onclick="javascript:showDiv()" /></div><div id="popDiv" style="display:none;">恭喜你！<br/>你的成绩为:60分<br/><a href="javascript:closeDiv()">关闭窗口</a></div><div id="bg" style="display:none;"></div><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></body></html>?