var button_on=new Array(6);
var button_off=new Array(6);
var now_menu;

<!--ドロップメニュー画像-->

for(var n=1; n<7;n++){
button_off[n]=new Image();
button_off[n].src="images/t_0"+n+".gif";
}

for(var n=1; n<7;n++){
button_on[n]=new Image();
button_on[n].src="images/t_0"+n+"_on.gif";
}

function changeImg_off(n){
	if(now_menu!=n){
		document.images["b0"+n+"_button"].src=button_off[n].src;
	}else if(now_menu==n){
		document.images["b0"+n+"_button"].src=button_on[n].src;
	}
}

function changeImg_on(n){
	if(now_menu!=n){
		document.images["b0"+n+"_button"].src=button_on[n].src;
	}else if(now_menu==n){
		document.images["b0"+n+"_button"].src=button_on[n].src;
	}
}

function winOpen(n){
	var wo1;
	wo1=window.open(n, "newwin","toolbar=yes,location=yes,directories=yes,menubar=yes,resizable=yes,status=yes,scrollbars=yes");
	wo1.focus();
	}