iPhone position:fixed scroll fix

iphone:fixed

	// Fixed position fix
	$('nav ul a').click(function(){
		// Find anchor position based on href
		var y=Math.floor($($(this).attr('href')).offset().top);
		// Add position fixed to nav
		fixIt();
		// Animate to anchor position
		$('html,body').animate({ scrollTop:y},500,function(){
			// On animation complete add position absolute to nav
			// using the anchor position as top
			$('nav ul, h1 a').css({position:'absolute',top:y})
		})
		// Prevent default
		return false;
	});
	// Add position fixed on touch move
	$(document).bind('touchmove',fixIt);
	function fixIt(){$('nav ul, h1 a').css({position:'fixed',top:0})}