function lmenu_check(id) {
	if (document.getElementById(id).className=='lm0') {
		document.getElementById(id).className='lm1';
		vid = "v" + id;
		document.getElementById(vid).style.visibility='visible';
	} else {
		document.getElementById(id).className='lm0';
		vid = "v" + id;
		document.getElementById(vid).style.visibility='hidden';
	}
}