DTR.nav = function(oThis,sSection)
{

      //set subnav item
      var hrefs = document.getElementById('dtrnav').getElementsByTagName('a');
      for(var i = 0;i < hrefs.length; i++)
      {
              hrefs[i].className = "dtr-unselect";
      }
 
      oThis.className = "dtr-select";

      //set subnav
      var spans = document.getElementById('dtrnav').getElementsByTagName('span');
      for(var j = 0;j < spans.length; j++)
      {
              spans[j].style.display = "none";
      }
      if (document.getElementById('sub-' + sSection)) {
	  		
	  		  document.getElementById('sub-' + sSection).parentNode.childNodes[0].id = 'dtrsubforce';
              document.getElementById('sub-' + sSection).style.display = "block";
      }

      //set background container
      var divs = document.getElementById('dtrnav').getElementsByTagName('div');
      for(var k = 0;k < divs.length; k++)
      {
              divs[k].className = "dtrsuboff";
      }
      if (document.getElementById('nav-' + sSection) && (document.getElementById('nav-' + sSection).getElementsByTagName('span').length != "0")) {
              document.getElementById('nav-' + sSection).className = "dtrsub";
      }

}