<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<style type="text/css">
.layout {
display: none;
position: absolute;
top: 40%;
left: 40%;
width: 20%;
height: 20%;
z-index: 1001;
text-align:center;
}
</style>
<script type="text/javascript">
function showLoading()
{
document.getElementById("layout").style.display = "block";
}
function hiddenLoading()
{
document.getElementById("layout").style.display = "none";
}
</script>
</head>
<body>
<div class="current"><a href="#" onclick="showLoading()">show</a></div>
<div class="current"><a href="#" onclick="hiddenLoading()">hidden</a></div>
<div class="layout" id="layout"><img src="img/load.gif" />loading.....</div>
</body>
</html>