--- a/mgallery.js	Thu Mar 22 21:58:13 2018 +0200
+++ b/mgallery.js	Thu Mar 22 21:59:31 2018 +0200
@@ -179,3 +179,31 @@
   ev.preventDefault();
   ev.target.click();
 }
+
+
+var mgalTouchX = null, mgalTouchY = null;
+
+function mgalTouchStart(evt)
+{
+  mgalTouchX = evt.touches[0].clientX;
+  mgalTouchY = evt.touches[0].clientY;
+}
+
+
+function mgalTouchMove(evt)
+{
+  if (mgalTouchX != null && mgalTouchY != null && evt)
+  {
+    var deltaX = mgalTouchX - evt.touches[0].clientX;
+    var deltaY = mgalTouchY - evt.touches[0].clientY;
+
+    if (Math.abs(deltaX) > Math.abs(deltaY))
+    {
+      if (deltaX < 0)
+        mgalNavigateTo(mgalPrevURL);
+      else
+        mgalNavigateTo(mgalNextURL);
+    }
+  }
+  mgalTouchX = mgalTouchY = null;
+}