Allow changing album pages by arrow keys.

public/js/albumnav.js

@@ -0,0 +1,32 @@
+function enableKeyDownNavigation() {
+	document.addEventListener("keydown", function (event) {
+		if (event.keyCode == 37) {
+			var target = document.querySelector(".pagination ul > :first-child a");
+			if (target && target.href) {
+				event.preventDefault();
+				document.location.href = target.href;
+			}
+		}
+		else if (event.keyCode == 39) {
+			var target = document.querySelector(".pagination ul > :last-child a");
+			if (target && target.href) {
+				event.preventDefault();
+				document.location.href = target.href;
+			}
+		}
+	}, false);
+}
+
+function disableKeyDownPropagation(obj) {
+	for (var x = 0; x < obj.length; x++) {
+		obj[x].addEventListener("keydown", function (event) {
+			if (event.keyCode == 37 || event.keyCode == 39) {
+				event.stopPropagation();
+			}
+		});
+	}
+}
+
+enableKeyDownNavigation();
+disableKeyDownPropagation(document.getElementsByTagName("textarea"));
+disableKeyDownPropagation(document.getElementsByTagName("input"));