https://www.danielmirer.com/js/navHelper.js

1var collapsed = true;
2var cLeft = '245px';
3
4$('.button').click(function() {
5//alert(collapsed);
6
7	if (collapsed){
8	  collapsed = false;
9	  $( "#newNav" ).animate({
10	  	opacity: 1,
11		left: "0",
12	  }, 400, function() {
13		
14		if (typeof staticNav == "undefined"){
15			$( "#contentArea" ).css({left: "245px"});
16		}
17
18		if (typeof $('#galleria') != "undefined"){
19		 	$('#galleria').resize();
20		 }
21	  });
22	} else {
23	  collapsed = true;
24	  //alert();
25	  $( "#newNav" ).animate({
26	    opacity: .5,
27		left: "-245px",
28	  }, 400, function() {
29			$( "#contentArea" ).css({left: "-13px"});
30			if (typeof $('#galleria') != "undefined"){
31				$('#galleria').resize();
32			 }
33	  });
34	}
35	return false;
36});