h1 {
	display: table-cell;
	vertical-align: middle;
	text-align: center;
}
h1 span { display: none; }
 
/* Portrait */
@media screen and (max-width: 320px)
{
	h1 span:nth-child(1) { display: inline; }
}
 
/* Landscape */
@media screen and (min-width: 321px)
{
	h1 span:nth-child(2) { display: inline; }
}

css media queries for determining iphone orientation

css, textmate, mobile, CSS3, iphone

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