function tSwap(swapNum){

document.thumb_swap.src="swap_0" + swapNum + ".jpg";
		
	for(var i=1;i<10;i++){
	if (i==swapNum)
	document.getElementById("swap" + i ).style.visibility ="visible";
	else
	document.getElementById("swap" + i).style.visibility ="hidden";
	}

}

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