css loading 效果

.loading{

width:160px;

height:56px;

position: absolute;

top:50%;

left:50%;

line-height:56px;

color:#fff;

padding-left:60px;

font-size:15px;

background: #000 url(images/loader.gif) no-repeat 10px 50%;

opacity: 0.7;

z-index:9999;

-moz-border-radius:20px;

-webkit-border-radius:20px;

border-radius:20px;

filter:progid:DXImageTransform.Microsoft.Alpha(opacity=70);

}

<div id="loading" class="loading">Loading pages...</div>