var ver4 = (navigator.appVersion.charAt(0) == "4");
var NN4 = ver4 && (navigator.appName == "Netscape");
var IE4 = ver4 && (navigator.appName.charAt(0) == "M");
var NN3 = ((navigator.appVersion.charAt(0) == "3") && (navigator.appName == "Netscape"));
if(NN3 || NN4 || IE4){
var imgM = new Array();
imgM[0] = new Image(); imgM[0].src = "http://www.narutaka.net/images/bt01a.jpg";
imgM[1] = new Image(); imgM[1].src = "http://www.narutaka.net/images/bt01b.jpg";
imgM[2] = new Image(); imgM[2].src = "http://www.narutaka.net/images/bt02a.jpg";
imgM[3] = new Image(); imgM[3].src = "http://www.narutaka.net/images/bt02b.jpg";
imgM[4] = new Image(); imgM[4].src = "http://www.narutaka.net/images/bt03a.jpg";
imgM[5] = new Image(); imgM[5].src = "http://www.narutaka.net/images/bt03b.jpg";
imgM[6] = new Image(); imgM[6].src = "http://www.narutaka.net/images/bt04a.jpg";
imgM[7] = new Image(); imgM[7].src = "http://www.narutaka.net/images/bt04b.jpg";
imgM[8] = new Image(); imgM[8].src = "http://www.narutaka.net/images/bt05a.jpg";
imgM[9] = new Image(); imgM[9].src = "http://www.narutaka.net/images/bt05b.jpg";
imgM[10] = new Image(); imgM[10].src = "http://www.narutaka.net/images/bt06a.jpg";
imgM[11] = new Image(); imgM[11].src = "http://www.narutaka.net/images/bt06b.jpg";
imgM[12] = new Image(); imgM[12].src = "http://www.narutaka.net/images/bt07a.jpg";
imgM[13] = new Image(); imgM[13].src = "http://www.narutaka.net/images/bt07b.jpg";
imgM[14] = new Image(); imgM[14].src = "http://www.narutaka.net/images/bt08a.jpg";
imgM[15] = new Image(); imgM[15].src = "http://www.narutaka.net/images/bt08b.jpg";
imgM[16] = new Image(); imgM[16].src = "http://www.narutaka.net/images/bt09a.jpg";
imgM[17] = new Image(); imgM[17].src = "http://www.narutaka.net/images/bt09b.jpg";
imgM[18] = new Image(); imgM[18].src = "http://www.narutaka.net/images/bt10a.jpg";
imgM[19] = new Image(); imgM[19].src = "http://www.narutaka.net/images/bt10b.jpg";
imgM[20] = new Image(); imgM[20].src = "http://www.narutaka.net/images/bt11a.jpg";
imgM[21] = new Image(); imgM[21].src = "http://www.narutaka.net/images/bt11b.jpg";
imgM[22] = new Image(); imgM[22].src = "http://www.narutaka.net/images/bt12a.jpg";
imgM[23] = new Image(); imgM[23].src = "http://www.narutaka.net/images/bt12b.jpg";
imgM[24] = new Image(); imgM[24].src = "http://www.narutaka.net/images/bt13a.jpg";
imgM[25] = new Image(); imgM[25].src = "http://www.narutaka.net/images/bt13b.jpg";
}

function Min(nam,num) {
if(NN3 || NN4 || IE4) document.images[nam].src = imgM[num].src;
}

function Mout(nam,num) {
if(NN3 || NN4 || IE4) document.images[nam].src = imgM[num].src;
}