loading 加载提示 ······ 透明遮罩 居中

spacer.gif

.progressBar {
border: solid 2px #86A5AD;
background: white url(progressBar_m.gif) no-repeat 10px 10px;
}
.progressBar {
display: block;
width: 148px;
height: 28px;
position: fixed;
top: 50%;

left: 50%;

margin-left: -74px;
margin-top: -14px;
padding: 10px 10px 10px 50px;
text-align: left;
line-height: 27px;
font-weight: bold;
position: absolute;
z-index: 2001;
}
<div id="background" class="background" style="display: none; "></div>
<div id="progressBar" class="progressBar" style="display: none; ">数据加载中，请稍等...</div>
var ajaxbg = $("#background,#progressBar");

ajaxbg.hide();

$(document).ajaxStart(function () {
ajaxbg.show();
}).ajaxStop(function () {
ajaxbg.hide();
});

转载自:http://www.jb51.net/article/28170.htm