body{
	overflow:hidden;
}
.loader {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 9999;
    text-align: center;
    background: rgb(249,249,249);
}
.helper {
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}