Fix many features for Internet Explorer 9 and 10

Please don't use "dataset" in scripts anymore, it doesn't work in IE9 or 10. Instead use $.data

js/toggle-images.js

@@ -20,7 +20,7 @@ $(document).ready(function(){
 	$('<style type="text/css"> img.hidden{ opacity: 0.1; background: grey; border: 1px solid #000; } </style>').appendTo($('head'));
 
 	var hideImage = function() {
-		if ($(this).parent()[0].dataset.expanded == 'true') {
+		if ($(this).parent().data('expanded') == 'true') {
 			$(this).parent().click();
 		}
 		$(this)