function show(item1,item2) {
  var k = new Array();
  var t = new Array();
  if(document.getElementById) {
    document.getElementById(item1).style.visibility = "visible";
    document.getElementById(item2).style.visibility = "visible";
    document.getElementById(item1).style.display = "inline";
    document.getElementById(item2).style.display = "inline";
  }
  for (var i=1; i<42; i++) {
    k[i]='k'+i;
    t[i]='t'+i;
    if (k[i]!=item1) {
      document.getElementById(k[i]).style.visibility = "hidden"; 
      document.getElementById(k[i]).style.display = "none";
    }
    if (t[i]!=item2) {
      document.getElementById(t[i]).style.visibility = "hidden"; 
      document.getElementById(t[i]).style.display = "none";
    }
  } 
}

function hide(item1,item2) {
 if(document.getElementById) {
   document.getElementById(item1).style.visibility = "hidden";
   document.getElementById(item2).style.visibility = "hidden";
   document.getElementById(item1).style.display = "none";
   document.getElementById(item2).style.display = "none";
   }
}