// JavaScript Document
function swap_e(n){
 for(var i=1;i<=12;i++){
	var curB=document.getElementById("e_"+i);
	var curC=document.getElementById("e_b"+i);
	if(n==i){
		curC.style.display="block";
		curB.className="gy1"
	}else{
		curC.style.display="none";
		curB.className="gy2"
			
	}
 }
}
function undo_swap_c()
{}