Some users with JDK 1.1 but JDK 1.2 security were getting NullPointerExceptions here.

js/rhino/org/mozilla/javascript/ScriptRuntime.java

@@ -2118,7 +2118,8 @@ public class ScriptRuntime {
                                   getContextClassLoaderMethod.invoke(
                                     Thread.currentThread(), 
                                     new Object[0]);
-                return cl.loadClass(className);
+                if (cl != null)
+                    return cl.loadClass(className);
             }
         } catch (SecurityException e) {
             // fall through...

js/rhino/src/org/mozilla/javascript/ScriptRuntime.java

@@ -2118,7 +2118,8 @@ public class ScriptRuntime {
                                   getContextClassLoaderMethod.invoke(
                                     Thread.currentThread(), 
                                     new Object[0]);
-                return cl.loadClass(className);
+                if (cl != null)
+                    return cl.loadClass(className);
             }
         } catch (SecurityException e) {
             // fall through...