function ShowAndHide(id1,id2,id3)
{
  if(document.getElementById)
  {
    el1=document.getElementById(id1);
    el2=document.getElementById(id2);
    el3=document.getElementById(id3);

    if(el1.style.display=="none")
    {
      el1.style.display="block";
      el2.style.display="none";
      el3.style.display="block";
    }
    else
    {
      el1.style.display="none";
      el2.style.display="block";
      el3.style.display="none";
    }
  }
}