function a(i)
{
 switch(i)
 {
 case 1:
document.getElementById("a1").style.display="block";
document.getElementById("a2").style.display="none";
document.getElementById("a3").style.display="none";


 break;
case 2:
document.getElementById("a1").style.display="none";
document.getElementById("a2").style.display="block";
document.getElementById("a3").style.display="none";


 break;
 case 3:
document.getElementById("a1").style.display="none";
document.getElementById("a2").style.display="none";
document.getElementById("a3").style.display="block";


 break;

 }
}


function b(i)
{
 switch(i)
 {
 case 1:
document.getElementById("b1").style.display="block";
document.getElementById("b2").style.display="none";

 break;
case 2:
document.getElementById("b1").style.display="none";
document.getElementById("b2").style.display="block";

 break;

 

 
 }
}



function c(i)
{
 switch(i)
 {
 case 1:
document.getElementById("c1").style.display="block";
document.getElementById("c2").style.display="none";
document.getElementById("c3").style.display="none";
document.getElementById("c4").style.display="none";
document.getElementById("c5").style.display="none";
 break;
case 2:
document.getElementById("c1").style.display="none";
document.getElementById("c2").style.display="block";
document.getElementById("c3").style.display="none";
document.getElementById("c4").style.display="none";
document.getElementById("c5").style.display="none";
 break;
 case 3:
document.getElementById("c1").style.display="none";
document.getElementById("c2").style.display="none";
document.getElementById("c3").style.display="block";
document.getElementById("c4").style.display="none";
document.getElementById("c5").style.display="none";
 break;
 case 4:
document.getElementById("c1").style.display="none";
document.getElementById("c2").style.display="none";
document.getElementById("c3").style.display="none";
document.getElementById("c4").style.display="block";
document.getElementById("c5").style.display="none";
 break;
 
  case 5:
document.getElementById("c1").style.display="none";
document.getElementById("c2").style.display="none";
document.getElementById("c3").style.display="none";
document.getElementById("c4").style.display="none";
document.getElementById("c5").style.display="block";
 break;
 
 }
}


function d(i)
{
 switch(i)
 {
 case 1:
document.getElementById("d1").style.display="block";
document.getElementById("d2").style.display="none";
document.getElementById("d3").style.display="none";
document.getElementById("d4").style.display="none";
document.getElementById("d5").style.display="none";

 break;
case 2:
document.getElementById("d1").style.display="none";
document.getElementById("d2").style.display="block";
document.getElementById("d3").style.display="none";
document.getElementById("d4").style.display="none";
document.getElementById("d5").style.display="none";
 break;
 case 3:
document.getElementById("d1").style.display="none";
document.getElementById("d2").style.display="none";
document.getElementById("d3").style.display="block";
document.getElementById("d4").style.display="none";
document.getElementById("d5").style.display="none";
 break;
 case 4:
document.getElementById("d1").style.display="none";
document.getElementById("d2").style.display="none";
document.getElementById("d3").style.display="none";
document.getElementById("d4").style.display="block";
document.getElementById("d5").style.display="none";
 break;
 
  case 5:
document.getElementById("d1").style.display="none";
document.getElementById("d2").style.display="none";
document.getElementById("d3").style.display="none";
document.getElementById("d4").style.display="none";
document.getElementById("d5").style.display="block";
 break;
 
 }
}