function SwitchNav(){                     
  if(switchPoint.innerText==7)
    {
    	switchPoint.innerText=8;
    	tdtree.firstChild.style.display="";
    	tdtree.children(1).style.display="none";
    }
  else
    {
    	switchPoint.innerText=7;
    	tdtree.firstChild.style.display="none";
    	tdtree.children(1).style.display="";
    }
}
function SwitchNav1(){                     
  if(switchPoint1.innerText==7)
    {
    	switchPoint1.innerText=8;
    	tdtree1.firstChild.style.display="";
    	tdtree1.children(1).style.display="none";
    }
  else
    {
    	switchPoint1.innerText=7;
    	tdtree1.firstChild.style.display="none";
    	tdtree1.children(1).style.display="";
    }
}