function table_down(table_c){
	var table_checku = "table_u"+table_c;
	var table_checkd = "table_d"+table_c;
	eval(table_checku).style.display='';
	eval(table_checkd).style.display='none';
}
function table_up(table_c){
	var table_checku = "table_u"+table_c;
	var table_checkd = "table_d"+table_c;
	eval(table_checku).style.display='none';
	eval(table_checkd).style.display='';
}