$(document).ready(function() {
		function movenav(){
		var viewportHeight = $(window).height();
		if (viewportHeight<600){
			$("#footer").addClass("bottom");
			} else {
				$("#footer").removeClass("bottom");
			};
		}					
 
 	movenav();
 	
 	$(window).bind("resize", function(){
 		movenav();
 		});
 });// JavaScript Document