Also find buttons by caption, if no value has been specified.

lib/webrat/field.rb

@@ -105,6 +105,10 @@ module Webrat
     def matches_value?(value)
       @element["value"] =~ /^\W*#{Regexp.escape(value.to_s)}/i
     end
+    
+    def matches_caption?(value)
+      @element.innerHTML =~ /^\W*#{Regexp.escape(value.to_s)}/i
+    end
 
     def to_param
       return nil if @value.nil?

lib/webrat/form.rb

@@ -37,6 +37,11 @@ module Webrat
         return possible_button if possible_button.matches_value?(value)
       end
       
+      #If nothing matched on value, try by name. 
+      possible_buttons.each do |possible_button|
+        return possible_button if possible_button.matches_caption?(value)
+      end
+      
       nil
     end