Add spec, all specs were made to pass.

lib/capybara/driver/rack_test_driver.rb

@@ -112,7 +112,7 @@ class Capybara::Driver::RackTest < Capybara::Driver::Base
     def params(button)
       params = {}
 
-      node.xpath(".//input[@type!='radio' and @type!='checkbox' and @type!='submit']").map do |input|
+      node.xpath(".//input[not(@type) or (@type!='radio' and @type!='checkbox' and @type!='submit')]").map do |input|
         merge_param!(params, input['name'].to_s, input['value'].to_s)
       end
       node.xpath(".//textarea").map do |textarea|

lib/capybara/driver/selenium_driver.rb

@@ -25,7 +25,7 @@ class Capybara::Driver::Selenium < Capybara::Driver::Base
     end
 
     def set(value)
-      if tag_name == 'textarea' or (tag_name == 'input' and %w(text password hidden file).include?(type))
+      if tag_name == 'textarea' or (tag_name == 'input' and [nil, 'text', 'password', 'hidden', 'file'].include?(type))
         node.clear
         node.send_keys(value.to_s)
       elsif tag_name == 'input' and type == 'radio'

lib/capybara/spec/session/fill_in_spec.rb

@@ -59,6 +59,12 @@ shared_examples_for "fill_in" do
       extract_results(@session)['schmooo'].should == 'Schmooo is the game'
     end
 
+    it "should fill in a field without a type" do
+      @session.fill_in('Phone', :with => '+1 555 7022')
+      @session.click_button('awesome')
+      extract_results(@session)['phone'].should == '+1 555 7022'
+    end
+
     it "should fill in a password field by name" do
       @session.fill_in('form[password]', :with => 'supasikrit')
       @session.click_button('awesome')

lib/capybara/spec/views/form.erb

@@ -46,7 +46,7 @@
 
   <p>
     <label for="form_phone">Phone</label>
-    <input type="text" name="form[phone]" value="+1 555 7021" id="form_phone"/>
+    <input name="form[phone]" value="+1 555 7021" id="form_phone"/>
   </p>
 
   <p>