1、页面引用
<link rel="stylesheet" href="../Js/layer/skin/layer.css" />
<script type="text/javascript" src="../Js/layer/layer.js"></script>
2、ajax请求中应用
<script type="text/javascript">
var loadingFlag;
$.ajax({
url: "../FlightHandler/JDFlightHandler.ashx",
type: "post",
data: info,
dataType: "text",
beforeSend: function (XMLHttpRequest) {
//注意，layer.msg默认3秒自动关闭，如果数据加载耗时比较长，需要设置time
loadingFlag= layer.msg('正在读取数据，请稍候……', { icon: 16, shade: 0.01,shadeClose:false,time:60000 });
},
success: function (data) {
layer.close(loadingFlag);
},
complete: function (XMLHttpRequest, textStatus) {
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
}
});
</script>
参考：
http://www.layui.com/doc/modules/layer.html
http://blog.csdn.net/responsecool/article/details/50506736