diff --git a/static/js/oml.js b/static/js/oml.js
index 182c825..9f14921 100644
--- a/static/js/oml.js
+++ b/static/js/oml.js
@@ -287,8 +287,10 @@
         // FF3.6 document.body can be undefined here
         window.onload = function() {
             document.body.style.margin = 0;
-            document.body.appendChild(loadingScreen);
-            startAnimation();
+            if (!animationInterval) {
+                document.body.appendChild(loadingScreen);
+                startAnimation();
+            }
         };
         // IE8 does not call onload if already loaded before set
         document.body && window.onload();
diff --git a/static/js/oml.update.js b/static/js/oml.update.js
index aec6d55..14961ad 100644
--- a/static/js/oml.update.js
+++ b/static/js/oml.update.js
@@ -121,8 +121,10 @@
         // FF3.6 document.body can be undefined here
         window.onload = function() {
             document.body.style.margin = 0;
-            document.body.appendChild(loadingScreen);
-            startAnimation();
+            if (!animationInterval) {
+                document.body.appendChild(loadingScreen);
+                startAnimation();
+            }
         };
         // IE8 does not call onload if already loaded before set
         document.body && window.onload();