function showsuba(id)
{
 for (i = 0;i<2;i++){
	 document.getElementById("taba"+i).style.display = "none";
 }
 document.getElementById("taba"+id).style.display = "";
} 
function showsubb(id)
{
 for (i = 0;i<2;i++){
	 document.getElementById("tabb"+i).style.display = "none";
 }
 document.getElementById("tabb"+id).style.display = "";
}