<style>
#my_loading{
	color:#FFF;
	font-weight:bold;
	padding:5px 15px;
	background:#000 ;
	z-index:200;
	position:fixed !important;/*important*/
	position:absolute;/*IE */
	float:right;
	top:200px;
	left:45%;
	text-align:center;
	display:none;
	font-size:14px;
	opacity:0.7;
	filter:alpha(opacity=70);
	-moz-border-radius: 5px;
	-webkit-border-radius: 5px;
}

</style>
<div id="my_loading">正在加载中，请稍等...</div>
<script type="text/javascript">$('#my_loading').show();</script>
