function tSwap_three(swapNum){

document.thumb_swap.src="swap_0" + swapNum + ".jpg";
	
	for(var i=1;i<16;i++){
	if (i==swapNum)
	document.getElementById("swap_a" + i ).style.visibility ="visible", document.getElementById("swap_b" + i ).style.visibility ="visible",document.getElementById("swap_c" + i ).style.visibility ="hidden";
	
	else
	document.getElementById("swap_a" + i).style.visibility ="hidden", document.getElementById("swap_b" + i).style.visibility ="hidden", document.getElementById("swap_c" + i).style.visibility ="visible";
	}

}

function tSwap_bk_txt(){
document.getElementById("swap10").style.visibility ="visible";
}