browser = 0;if (document.images) {browser = 1}

	if (browser) {
		ppathb = "images/menu_3bottom/"
		buttonb_prefix = "on_"
		buttonb_prefix_off = "off_"
		buttonb_num    = 3	
	buttonb_on     = new Array(buttonb_num)	
	buttonb_off    = new Array(buttonb_num)	

	for (i=1; i<=buttonb_num;i++){	
		setbuttonb_on = ppathb + buttonb_prefix + i + ".gif"
		setbuttonb_off = ppathb + buttonb_prefix_off + i + ".gif"
		buttonb_on[i] = new Image()
		buttonb_off[i] = new Image()
		buttonb_on[i].src = setbuttonb_on
		buttonb_off[i].src = setbuttonb_off
		}
	}  	

	function bb_on(n){
		if ((browser)&&(n==1)) document.butb1.src = buttonb_on[n].src
		if ((browser)&&(n==2)) document.butb2.src = buttonb_on[n].src
		if ((browser)&&(n==3)) document.butb3.src = buttonb_on[n].src
	}        	

	function bb_off(n){
		if ((browser)&&(n==1)) document.butb1.src = buttonb_off[n].src
		if ((browser)&&(n==2)) document.butb2.src = buttonb_off[n].src
		if ((browser)&&(n==3)) document.butb3.src = buttonb_off[n].src
	}