Issue 1396 - Avoid infinite recursion when collapsing <input type="image"> elements

include.preload.js

Index: include.preload.js
===================================================================
--- a/include.preload.js
+++ b/include.preload.js
@@ -47,11 +47,22 @@
       {
         if (response && element.parentNode)
         {
+          var property = "display";
+          var value = "none";
+
           // <frame> cannot be removed, doing that will mess up the frameset
           if (tag == "frame")
-            element.style.setProperty("visibility", "hidden", "important");
-          else
-            element.style.setProperty("display", "none", "important");
+          {
+            property = "visibility";
+            value = "hidden";
+          }
+
+          // <input type="image"> elements try to load their image again
+          // when the "display" CSS property is set. So we have to check
+          // that it isn't already collapsed to avoid an infinite recursion.
+          if (element.style.getPropertyValue(property) != value ||
+              element.style.getPropertyPriority(property) != "important")
+            element.style.setProperty(property, value, "important");
         }
       }
     );