function showDiv1()
{
  if( div1.style.display == "none")
    div1.style.display = "";
  else
    div1.style.display = "none";
        
  if( div2.style.display == "")
    div2.style.display = "none";
  
  if( div1_1.style.display == "")
    div1_1.style.display = "none";

  if( div1_2.style.display == "")
    div1_2.style.display = "none";

  if( div2_1.style.display == "")
    div2_1.style.display = "none";

  if( div2_2.style.display == "")
    div2_2.style.display = "none";
  

}

function showDiv2()
{
   if( div2.style.display == "none")
    div2.style.display = "";
  else
    div2.style.display = "none";
    
  if( div1.style.display == "")
    div1.style.display = "none";
    
  if( div1_1.style.display == "")
    div1_1.style.display = "none";

  if( div1_2.style.display == "")
    div1_2.style.display = "none";

  if( div2_1.style.display == "")
    div2_1.style.display = "none";

  if( div2_2.style.display == "")
    div2_2.style.display = "none";
}


function showDiv1_1()
{
   if( div1_1.style.display == "none")
    div1_1.style.display = "";
  else
    div1_1.style.display = "none";

  if( div1_2.style.display == "")
    div1_2.style.display = "none";
}
function showDiv1_2()
{
   if( div1_2.style.display == "none")
    div1_2.style.display = "";
  else
    div1_2.style.display = "none";

if( div1_1.style.display == "")
    div1_1.style.display = "none";

}

function showDiv2_1()
{
   if( div2_1.style.display == "none")
    div2_1.style.display = "";
  else
    div2_1.style.display = "none";

  if( div2_2.style.display == "")
    div2_2.style.display = "none";
}

function showDiv2_2()
{
   if( div2_2.style.display == "none")
    div2_2.style.display = "";
  else
    div2_2.style.display = "none";

  if( div2_1.style.display == "")
    div2_1.style.display = "none";
}