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[10] = new Image(); imgM[10].src = "../image/menu/btn01.gif";
imgM[11] = new Image(); imgM[11].src = "../image/menu/btn01r.gif";
imgM[20] = new Image(); imgM[20].src = "../image/menu/btn02.gif";
imgM[21] = new Image(); imgM[21].src = "../image/menu/btn02r.gif";
imgM[30] = new Image(); imgM[30].src = "../image/menu/btn03.gif";
imgM[31] = new Image(); imgM[31].src = "../image/menu/btn03r.gif";
imgM[40] = new Image(); imgM[40].src = "../image/menu/btn04.gif";
imgM[41] = new Image(); imgM[41].src = "../image/menu/btn04r.gif";
imgM[50] = new Image(); imgM[50].src = "../image/menu/btn05.gif";
imgM[51] = new Image(); imgM[51].src = "../image/menu/btn05r.gif";
imgM[60] = new Image(); imgM[60].src = "../image/menu/btn06.gif";
imgM[61] = new Image(); imgM[61].src = "../image/menu/btn06r.gif";
imgM[70] = new Image(); imgM[70].src = "../image/menu/btn07.gif";
imgM[71] = new Image(); imgM[71].src = "../image/menu/btn07r.gif";
imgM[80] = new Image(); imgM[80].src = "../image/menu/btn08.gif";
imgM[81] = new Image(); imgM[81].src = "../image/menu/btn08r.gif";
imgM[90] = new Image(); imgM[90].src = "../image/menu/btn09.gif";
imgM[91] = new Image(); imgM[91].src = "../image/menu/btn09r.gif";
}

function Mix(num,nam) {
if(NN3 || NN4 || IE4) {
              box=num*10+nam;
              document.images["M"+num].src = imgM[box].src;
              }
}