var $OldArg="";
function penchtable($Arg)
{
	if($OldArg)
	{
 		document.getElementById("ch_table_"+$OldArg).style.display="none";
 		document.getElementById("ch_table_legend_"+$OldArg).style.display="none";
 		document.getElementById("tourtblhead"+$OldArg).className="";
 		$OldArg="";
	}
	if($OldArg!=$Arg)
	{
 		document.getElementById("ch_table_"+$Arg).style.display="";
 		document.getElementById("ch_table_legend_"+$Arg).style.display="";
 		document.getElementById("tourtblhead"+$Arg).className="active";
 		$OldArg=$Arg;
	}

}