onload="addHeaderTags()">
   <div style="height: 13px;">
      <div onmouseover="this.style.cursor='pointer';"
         onclick="showElem('legend');"
         onmouseout="hideElem('legend')"
	 style="height: 6px; position: absolute;"
         class="pre noprint docinfo bgyellow"
         title="Click for colour legend." >                                                                        </div>
      <div id="legend"
           class="docinfo noprint pre legend"
           style="position:absolute; top: