How to set wait/process bar/blur div using css html

Html

Add following code in you html

<div class="wait"></div>

Css

Add following code in you css

.wait{
 background: #fff url("../img/waiting.gif") no-repeat scroll center center;
 bottom: 0;
 left: 0;
 opacity: 0.5;
 position: fixed;
 right: 0;
 top: 0;
 z-index: 1;
}