if (document.images) {

	var img1on = new Image();
	img1on.src = "topimg/menua.gif";
	var img1off = new Image();
	img1off.src = "topimg/menu1.gif";

	var img2on = new Image();
	img2on.src = "topimg/menub.gif";
	var img2off = new Image();
	img2off.src = "topimg/menu2.gif";

	var img3on = new Image();
	img3on.src = "topimg/menuc.gif";
	var img3off = new Image();
	img3off.src = "topimg/menu3.gif";

	var img4on = new Image();
	img4on.src = "topimg/menud.gif";
	var img4off = new Image();
	img4off.src = "topimg/menu4.gif";

	var img5on = new Image();
	img5on.src = "topimg/menue.gif";
	var img5off = new Image();
	img5off.src = "topimg/menu5.gif";

        var img6on = new Image();
	img6on.src = "img/menubloga.gif";
	var img6off = new Image();
	img6off.src = "img/menublog.gif";

        var img7on = new Image();
	img7on.src = "img/menuseitoa.gif";
	var img7off = new Image();
	img7off.src = "img/menuseito.gif";
        
        var img8on = new Image();
	img8on.src = "img/menutesta.gif";
	var img8off = new Image();
	img8off.src = "img/menutest.gif";

          
        var img9on = new Image();
	img9on.src = "img/recruitover.gif";
	var img9off = new Image();
	img9off.src = "img/recruit.gif";

        var img10on = new Image();
	img10on.src = "img/jukuchoover.gif";
	var img10off = new Image();
	img10off.src = "img/jukucho.gif";

        var img11on = new Image();
	img11on.src = "img/bestaover.gif";
	var img11off = new Image();
	img11off.src = "img/besta.gif";

        var img12on = new Image();
	img12on.src = "img/syougakuover.gif";
	var img12off = new Image();
	img12off.src = "img/syougaku.gif";

        var img13on = new Image();
	img13on.src = "img/chuugakuover.gif";
	var img13off = new Image();
	img13off.src = "img/chuugaku.gif";

        var img14on = new Image();
	img14on.src = "img/koukouover.gif";
	var img14off = new Image();
	img14off.src = "img/koukou.gif";

        var img15on = new Image();
	img15on.src = "img/eikenover.gif";
	var img15off = new Image();
	img15off.src = "img/eiken.gif";

        var img16on = new Image();
	img16on.src = "img/kankenover.gif";
	var img16off = new Image();
	img16off.src = "img/kanken.gif";

        var img17on = new Image();
	img17on.src = "topimg/menuf.gif";
	var img17off = new Image();
	img17off.src = "topimg/menu6.gif";

      var img18on = new Image();
	img18on.src = "img/menuiventa.gif";
	var img18off = new Image();
	img18off.src = "img/menuivent.gif";
	

}

function On(name) {

	if (document.images) {

		document.images[name].src = eval(name + 'on.src');

	}
}

function Off(name) {

	if (document.images) {

		document.images[name].src = eval(name + 'off.src');

	}

}

function disp(url){

	window.open(url, "window_name", "width=340,height=300,scrollbars=yes,menubar=no,status=no" );

}

function disp2(url){

	window.open(url, "window_name", "width=700,height=500,scrollbars=yes,menubar=no,status=no" );

}

function disp3(url){

	window.open(url, "window_name", "width=550,height=600,scrollbars=yes,menubar=no,status=no" );

}