getElementById Problem

<script>
          function changeNavigation(id)
          {document.getElementById('navigate').innerHTML=document.getElementById(id).innerHTML}
          </script>

<img src="IMAGE" width="HERE" height="HERE" border="0" usemap="#ImageMap1">
<div style="width:HEREpx; height:HEREpx; position:absolute; left:HEREpx; top:HEREpx; z-index:1; overflow:auto;"
id="HERE">
Blaa
</div>
<div style="display:none; overflow=none"; id="HERE">
And add as many as I need of these.
</div>
<map name="ImageMap1">
<area shape="HERE" coords="HERE" name="HERE"
onClick="changeNavigation('HERE')">
</map>