Index: trunk/src/org/openstreetmap/josm/data/validation/routines/UrlValidator.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/routines/UrlValidator.java	(revision 7696)
+++ trunk/src/org/openstreetmap/josm/data/validation/routines/UrlValidator.java	(revision 7698)
@@ -157,4 +157,7 @@
     private static final Pattern PORT_PATTERN = Pattern.compile(PORT_REGEX);
 
+    private static final String SIMPLE_WEBSITE = "^www[.].*";
+    private static final Pattern SIMPLE_WEBSITE_PATTERN = Pattern.compile(SIMPLE_WEBSITE);
+
     /**
      * Holds the set of current validation options.
@@ -298,4 +301,7 @@
         if (!isValidScheme(scheme)) {
             setErrorMessage(tr("URL contains an invalid protocol: {0}", scheme));
+            if (SIMPLE_WEBSITE_PATTERN.matcher(value).matches()) {
+                setFix("http://" + value);
+            }
             return false;
         }