code: public String getHtmlPart(String part, String replaceString) {
  
          String value = m_htmlProps.getProperty(part);
          if (value == null) {
              return "";
          } else {
              return CmsStringUtil.substitute(value, "$replace$", replaceString);
          }
      }
docs: Returns the specified HTML part of the HTML property file to create the output.<p>
  
  @param part the name of the desired part
  @param replaceString String which is inserted in the found HTML part at the location of "$replace$"
  @return the HTML part or an empty String, if the part was not found