1 files changed, 23 insertions, 3 deletions
diff --git a/src/3rdparty/webkit/WebCore/html/HTMLInputElement.cpp b/src/3rdparty/webkit/WebCore/html/HTMLInputElement.cpp
index ed3405a..f25c908 100644
--- a/src/3rdparty/webkit/WebCore/html/HTMLInputElement.cpp
+++ b/src/3rdparty/webkit/WebCore/html/HTMLInputElement.cpp
@@ -1549,9 +1549,16 @@ void HTMLInputElement::defaultEventHandler(Event* evt)
             if (r && r->isTextField())
                 toRenderTextControl(r)->setEdited(false);
         }
-        // Form may never have been present, or may have been destroyed by the change event.
-        if (form())
-            form()->submitClick(evt);
+
+        RefPtr<HTMLFormElement> formForSubmission = form();
+        // If there is no form and the element is an <isindex>, then create a temporary form just to be used for submission.
+        if (!formForSubmission && inputType() == ISINDEX)
+            formForSubmission = createTemporaryFormForIsIndex();
+
+        // Form may never have been present, or may have been destroyed by code responding to the change event.
+        if (formForSubmission)
+            formForSubmission->submitClick(evt);
+
         evt->setDefaultHandled();
         return;
     }
@@ -1569,6 +1576,19 @@ void HTMLInputElement::defaultEventHandler(Event* evt)
         HTMLFormControlElementWithState::defaultEventHandler(evt);
 }
 
+PassRefPtr<HTMLFormElement> HTMLInputElement::createTemporaryFormForIsIndex()
+{
+    RefPtr<HTMLFormElement> form = new HTMLFormElement(formTag, document());
+    form->registerFormElement(this);
+    form->setMethod("GET");
+    if (!document()->baseURL().isEmpty()) {
+        // We treat the href property of the <base> element as the form action, as per section 7.5 
+        // "Queries and Indexes" of the HTML 2.0 spec. <http://www.w3.org/MarkUp/html-spec/html-spec_7.html#SEC7.5>.
+        form->setAction(document()->baseURL().string());
+    }
+    return form.release();
+}
+
 bool HTMLInputElement::isURLAttribute(Attribute *attr) const
 {
     return (attr->name() == srcAttr);