JS: Hide Address Bar for iOS & Android

/*
  * Normalized hide address bar for iOS & Android
  * (c) Scott Jehl, scottjehl.com
  * MIT License
*/
(function( win ){
	var doc = win.document;
	
	// If there's a hash, or addEventListener is undefined, stop here
	if( !location.hash && win.addEventListener ){
		
		//scroll to 1
		window.scrollTo( 0, 1 );
		var scrollTop = 1,
			getScrollTop = function(){
				return win.pageYOffset || doc.compatMode === "CSS1Compat" && doc.documentElement.scrollTop || doc.body.scrollTop || 0;
			},
		
			//reset to 0 on bodyready, if needed
			bodycheck = setInterval(function(){
				if( doc.body ){
					clearInterval( bodycheck );
					scrollTop = getScrollTop();
					win.scrollTo( 0, scrollTop === 1 ? 0 : 1 );
				}	
			}, 15 );
		
		win.addEventListener( "load", function(){
			setTimeout(function(){
				//at load, if user hasn't scrolled more than 20 or so...
				if( getScrollTop() < 20 ){
					//reset to hide addr bar at onload
					win.scrollTo( 0, scrollTop === 1 ? 0 : 1 );
				}
			}, 0);
		} );
	}
})( this );