求帮助！！！
<style type="text/css"><!--
#waiting {
position: absolute;
display: none;
width: 200px;
background-color: #FFFFFF;
color: #000000;
border: 2px groove #3366FF;
z-index: 10;
font-weight: bold;
font-size: x-small;
filter:alpha(opacity=70);
-moz-opacity:0.7;
}
#waiting p {
margin: 0 0 0 3em;
padding: 0;
line-height: 1.7;
}
有谁能逐条解释一下 谢谢了 感谢
