diff --git a/scrapy/http/request/form.py b/scrapy/http/request/form.py
index 65c6895f0..0d37004fb 100644
--- a/scrapy/http/request/form.py
+++ b/scrapy/http/request/form.py
@@ -31,10 +31,10 @@ class FormRequest(Request):
                 self._set_url(self.url + ('&' if '?' in self.url else '?') + querystr)
 
     @classmethod
-    def from_response(cls, response, formname=None, formnumber=0, formdata=None,
+    def from_response(cls, response, formname=None, formid=None, formnumber=0, formdata=None,
                       clickdata=None, dont_click=False, formxpath=None, **kwargs):
         kwargs.setdefault('encoding', response.encoding)
-        form = _get_form(response, formname, formnumber, formxpath)
+        form = _get_form(response, formname, formid, formnumber, formxpath)
         formdata = _get_inputs(form, formdata, dont_click, clickdata, response)
         url = _get_form_url(form, kwargs.pop('url', None))
         method = kwargs.pop('method', form.method)
@@ -54,7 +54,7 @@ def _urlencode(seq, enc):
     return urlencode(values, doseq=1)
 
 
-def _get_form(response, formname, formnumber, formxpath):
+def _get_form(response, formname, formid, formnumber, formxpath):
     """Find the form element """
     from scrapy.selector.lxmldocument import LxmlDocument
     root = LxmlDocument(response, lxml.html.HTMLParser)
@@ -67,6 +67,11 @@ def _get_form(response, formname, formnumber, formxpath):
         if f:
             return f[0]
 
+    if formid is not None:
+        f = root.xpath('//form[@id="%s"]' % formid)
+        if f:
+            return f[0]
+            
     # Get form element from xpath, if not found, go up
     if formxpath is not None:
         nodes = root.xpath(formxpath)
diff --git a/tests/test_http_request.py b/tests/test_http_request.py
index 805a22a1f..5709b6b31 100644
--- a/tests/test_http_request.py
+++ b/tests/test_http_request.py
@@ -538,6 +538,60 @@ class FormRequestTest(RequestTest):
         self.assertRaises(IndexError, self.request_class.from_response, \
                           response, formname="form3", formnumber=2)
 
+    def test_from_response_formid_exists(self):
+        response = _buildresponse(
+            """<form action="post.php" method="POST">
+            <input type="hidden" name="one" value="1">
+            <input type="hidden" name="two" value="2">
+            </form>
+            <form id="form2" action="post.php" method="POST">
+            <input type="hidden" name="three" value="3">
+            <input type="hidden" name="four" value="4">
+            </form>""")
+        r1 = self.request_class.from_response(response, formid="form2")
+        self.assertEqual(r1.method, 'POST')
+        fs = _qs(r1)
+        self.assertEqual(fs, {'four': ['4'], 'three': ['3']})
+
+    def test_from_response_formname_notexists_fallback_formid(self):
+        response = _buildresponse(
+            """<form action="post.php" method="POST">
+            <input type="hidden" name="one" value="1">
+            <input type="hidden" name="two" value="2">
+            </form>
+            <form id="form2" name="form2" action="post.php" method="POST">
+            <input type="hidden" name="three" value="3">
+            <input type="hidden" name="four" value="4">
+            </form>""")
+        r1 = self.request_class.from_response(response, formname="form3", formid="form2")
+        self.assertEqual(r1.method, 'POST')
+        fs = _qs(r1)
+        self.assertEqual(fs, {'four': ['4'], 'three': ['3']})
+
+    def test_from_response_formid_notexist(self):
+        response = _buildresponse(
+            """<form id="form1" action="post.php" method="POST">
+            <input type="hidden" name="one" value="1">
+            </form>
+            <form id="form2" action="post.php" method="POST">
+            <input type="hidden" name="two" value="2">
+            </form>""")
+        r1 = self.request_class.from_response(response, formid="form3")
+        self.assertEqual(r1.method, 'POST')
+        fs = _qs(r1)
+        self.assertEqual(fs, {'one': ['1']})
+
+    def test_from_response_formid_errors_formnumber(self):
+        response = _buildresponse(
+            """<form id="form1" action="post.php" method="POST">
+            <input type="hidden" name="one" value="1">
+            </form>
+            <form id="form2" name="form2" action="post.php" method="POST">
+            <input type="hidden" name="two" value="2">
+            </form>""")
+        self.assertRaises(IndexError, self.request_class.from_response, \
+                          response, formid="form3", formnumber=2)
+
     def test_from_response_select(self):
         res = _buildresponse(
             '''<form>