// JavaScript Document
function right(a,b) 
{ 
for(i=1;i<=3;i++){ 
if (b==3){
	document.getElementById(a+3).style.display = "none"; 
   document.getElementById(a+1).style.display = "";
}
else if(b==i)
{ 
document.getElementById(a+i).style.display = "none"; 
document.getElementById(a+(i+1)).style.display = "";  
} 
} 
}
function left(a,c) 
{ 
for(i=1;i<=3;i++){ 
if (c==1){
	document.getElementById(a+1).style.display = "none";  
   document.getElementById(a+3).style.display = "";
}
else if(c==i)
{ 
document.getElementById(a+i).style.display = "none"; 
document.getElementById(a+(i-1)).style.display = "";  
} 
} 
}