function new_na_btn_mdown(divid, spanid){
	document.getElementById(divid).className = 'new_na_button_div_active';
	document.getElementById(spanid).className = 'new_na_button_span_active';
}
function new_na_btn_mup(divid, spanid){
	document.getElementById(divid).className = 'new_na_button_div';
	document.getElementById(spanid).className = 'new_na_button_span';
}