var img = new Array();

img[901] = new Image();  img[901].src="http://www.flat-kanri.jp/images/font_big.gif";
img[902] = new Image();  img[902].src="http://www.flat-kanri.jp/images/font_big_.gif";
img[903] = new Image();  img[903].src="http://www.flat-kanri.jp/images/font_def.gif";
img[904] = new Image();  img[904].src="http://www.flat-kanri.jp/images/font_def_.gif";
img[905] = new Image();  img[905].src="http://www.flat-kanri.jp/images/font_mini.gif";
img[906] = new Image();  img[906].src="http://www.flat-kanri.jp/images/font_mini_.gif";
img[907] = new Image();  img[907].src="http://www.flat-kanri.jp/images/head_qa.gif";
img[908] = new Image();  img[908].src="http://www.flat-kanri.jp/images/head_qa_.gif";
img[909] = new Image();  img[909].src="http://www.flat-kanri.jp/images/head_form.gif";
img[910] = new Image();  img[910].src="http://www.flat-kanri.jp/images/head_form_.gif";

img[809] = new Image();  img[809].src="http://www.flat-kanri.jp/images/menu_top.gif";
img[810] = new Image();  img[810].src="http://www.flat-kanri.jp/images/menu_top_.gif";

function change_image(nam,num) {
        if(navigator.appVersion.charAt(0)>= 3) {
                document.images[nam].src = img[num].src;
        }
}