Image submit now works.

Signed-off-by: Assaf Arkin <assaf@labnotes.org>

spec/forms-spec.coffee

@@ -40,6 +40,7 @@ brains.get "/form", (req, res)-> res.send """
         <input type="unknown" name="unknown" value="yes">
         <input type="reset" value="Reset">
         <input type="submit" name="button" value="Submit">
+        <input type="image" name="image" id="image_submit" value="Image Submit">
 
         <button name="button" value="hit-me">Hit Me</button>
       </form>
@@ -58,6 +59,7 @@ brains.post "/submit", (req, res)-> res.send """
       <div id="hobbies">#{JSON.stringify(req.body.hobbies)}</div>
       <div id="unknown">#{req.body.unknown}</div>
       <div id="clicked">#{req.body.button}</div>
+      <div id="image_clicked">#{req.body.image}</div>
     </body>
   </html>
   """
@@ -286,6 +288,23 @@ vows.describe("Forms").addBatch(
         "should send input values to server": (browser)->
           assert.equal browser.text("#name"), "ArmBiter"
           assert.equal browser.text("#likes"), "Arm Biting"
+        "should not send other button values to server": (browser)->
+          assert.equal browser.text("#image_clicked"), "undefined"
+
+    "by clicking image button":
+      zombie.wants "http://localhost:3003/form"
+        topic: (browser)->
+          browser.fill("Name", "ArmBiter").fill("likes", "Arm Biting").
+            pressButton "#image_submit", @callback
+        "should open new page": (browser)-> assert.equal browser.location, "http://localhost:3003/submit"
+        "should add location to history": (browser)-> assert.length browser.window.history, 2
+        "should send image value to server": (browser)-> assert.equal browser.text("#image_clicked"), "Image Submit"
+        "should send input values to server": (browser)->
+          assert.equal browser.text("#name"), "ArmBiter"
+          assert.equal browser.text("#likes"), "Arm Biting"
+        "should not send other button values to server": (browser)->
+          assert.equal browser.text("#clicked"), "undefined"
+
     "by clicking input":
       zombie.wants "http://localhost:3003/form"
         topic: (browser)->

src/zombie/forms.coffee

@@ -45,7 +45,8 @@ core.HTMLFormElement.prototype.submit = (button)->
         else if field.nodeName == "INPUT" && field.type == "file"
           params[name] = new UploadedFile(field.value) if field.value
         else if field.nodeName == "TEXTAREA" || field.nodeName == "INPUT"
-          params[name] = field.value if field.value
+          if field.value && field.type != "submit" && field.type != "image"
+            params[name] = field.value
 
       process index + 1
     else
@@ -93,7 +94,7 @@ core.HTMLInputElement.prototype._eventDefaults =
       when "reset"
         if form = input.form
           form.reset()
-      when "submit"
+      when "submit", "image"
         if form = input.form
           form._dispatchSubmitEvent input
       when "checkbox"