Iphone: orientation

gistfile1.js

<script>

	if (!isNaN(window.orientation)) {
	    var orientation = (window.orientation == 0 || window.orientation == 180) ? "portrait" : "landscape";
	    $("body").addClass(orientation);
	} else {
	    // Choose layout depending on viewport width
	    var orientation = ($(window).width() < 980) ? "portrait" : "landscape";
	    $("body").addClass(orientation);
	}

</script>

OR

<script>

window.onorientationchange = function() {
    var orientation = (window.orientation == 0 || window.orientation == 180) ? "portrait" : "landscape";
    $("body").attr("class", orientation);
}

</script>