function initMenu ( id ) {
	menu = document . getElementById ( id ) ;
	menuItems = menu . getElementsByTagName ( 'li' ) ;
	menuLength = menuItems . length ;
	j = 0 ;
	for ( i = 1 ; i < menuLength ; i ++ ) {
		if ( j == 3 ) { j = 0 ; }
		menuItems [ i ] . className += ' n' + j ;
		j ++ ;
	}
}

var menu ;
var menuItems ;