jquery.mobile.transition.slidedown.css

/* slide down */
.slidedown.out {
	-webkit-animation-name: fadeout;
	-moz-animation-name: fadeout;
	-webkit-animation-duration: 100ms;
	-moz-animation-duration: 100ms;
}

.slidedown.in {
	-webkit-transform: translateY(0);
	-webkit-animation-name: slideinfromtop;
	-moz-transform: translateY(0);
	-moz-animation-name: slideinfromtop;
	-webkit-animation-duration: 250ms;
	-moz-animation-duration: 250ms;
}

.slidedown.in.reverse {
	-webkit-animation-name: fadein;
	-moz-animation-name: fadein;
	-webkit-animation-duration: 150ms;
	-moz-animation-duration: 150ms;
}

.slidedown.out.reverse {
	-webkit-transform: translateY(-100%);
	-moz-transform: translateY(-100%);
	-webkit-animation-name: slideouttotop;
	-moz-animation-name: slideouttotop;
	-webkit-animation-duration: 200ms;
	-moz-animation-duration: 200ms;
}

@-webkit-keyframes slideinfromtop {
    from { -webkit-transform: translateY(-100%); }
    to { -webkit-transform: translateY(0); }
}
@-moz-keyframes slideinfromtop {
    from { -moz-transform: translateY(-100%); }
    to { -moz-transform: translateY(0); }
}

@-webkit-keyframes slideouttotop {
    from { -webkit-transform: translateY(0); }
    to { -webkit-transform: translateY(-100%); }
}
@-moz-keyframes slideouttotop {
    from { -moz-transform: translateY(0); }
    to { -moz-transform: translateY(-100%); }
}