jquery-mobile/css/structure/jquery.mobile.transitions.css

/* Transitions originally inspired by those from jQtouch, nice work, folks */
.ui-mobile-viewport-transitioning,
.ui-mobile-viewport-transitioning .ui-page {
	width: 100%;
	height: 100%;
	overflow: hidden;
}

.in {
	-webkit-animation-timing-function: ease-out;
	-webkit-animation-duration: 350ms;
	-moz-animation-timing-function: ease-out;
	-moz-animation-duration: 350ms;
}

.out {
	-webkit-animation-timing-function: ease-in;
	-webkit-animation-duration: 225ms;
	-moz-animation-timing-function: ease-in;
	-moz-animation-duration: 225;
}