old_contents: # Copyright 2006 James Tauber and contributors
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  from pyjamas import DOM
  
  from pyjamas.ui.ComplexPanel import ComplexPanel
  
  HTMLPanel_sUid = 0
  
  class HTMLPanel(ComplexPanel):
      def __init__(self, html):
          ComplexPanel.__init__(self)
          self.setElement(DOM.createDiv())
          DOM.setInnerHTML(self.getElement(), html)
  
      def add(self, widget, id):
          element = self.getElementById(self.getElement(), id)
          if element == None:
              # throw new NoSuchElementException()
              return
          ComplexPanel.add(self, widget, element)
  
      def createUniqueId(self):
          global HTMLPanel_sUid
  
          HTMLPanel_sUid += 1
          return "HTMLPanel_" + HTMLPanel_sUid
  
      def getElementById(self, element, id):
          element_id = DOM.getAttribute(element, "id")
          if element_id != None and element_id == id:
              return element
  
          child = DOM.getFirstChild(element)
          while child != None:
              ret = self.getElementById(child, id)
              if ret != None:
                  return ret
              child = DOM.getNextSibling(child)
  
          return None
  
  
  
new_contents: # Copyright 2006 James Tauber and contributors
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  from pyjamas import DOM
  
  from pyjamas.ui.ComplexPanel import ComplexPanel
  
  HTMLPanel_sUid = 0
  
  class HTMLPanel(ComplexPanel):
      def __init__(self, html):
          ComplexPanel.__init__(self)
          self.setElement(DOM.createDiv())
          DOM.setInnerHTML(self.getElement(), html)
  
      def add(self, widget, id):
          element = self.getElementById(self.getElement(), id)
          if element == None:
              # throw new NoSuchElementException()
              return
          ComplexPanel.add(self, widget, element)
  
      def createUniqueId(self):
          global HTMLPanel_sUid
  
          HTMLPanel_sUid += 1
          return "HTMLPanel_%d" % HTMLPanel_sUid
  
      def getElementById(self, element, id):
          element_id = DOM.getAttribute(element, "id")
          if element_id != None and element_id == id:
              return element
  
          child = DOM.getFirstChild(element)
          while child != None:
              ret = self.getElementById(child, id)
              if ret != None:
                  return ret
              child = DOM.getNextSibling(child)
  
          return None
  
  
  
subject: use % not concatenation of string plus integer (that's a javascriptism)