div+css 遮罩层

CSS样式部分:

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<style type="text/css">
#loading-mask{
        position:absolute;
        left:0;
        top:0;
        100%;
        height:100%;
        z-index:20000;
        background-color:gray;
    }
    #loading{
        position:absolute;
        left:45%;
        top:40%;
        padding:2px;
        z-index:20001;
        height:auto;
 }
    #loading .loading-indicator{
        background:white;
        color:#444;
        font:bold 20px tahoma,arial,helvetica;
        padding:10px;
        margin:0;
        height:auto;
    }
    #loading-msg {
        font: normal 18px arial,tahoma,sans-serif;
    }
</style>

HTML部分：

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<div id='loading-mask'></div>
<div id="loading">
    <div class="loading-indicator">
       <img src="large-loading.gif" width="32" height="32" style="margin-right:8px;float:left;vertical-align:top;"/>
       <br/><span id="loading-msg">Loading ...</span>
    </div>
</div>