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 imgL = new Array();
imgL[10] = new Image(); imgL[10].src = "../image/menu/mibtn01.gif";
imgL[11] = new Image(); imgL[11].src = "../image/menu/mibtn01r.gif";
imgL[20] = new Image(); imgL[20].src = "../image/menu/mibtn02.gif";
imgL[21] = new Image(); imgL[21].src = "../image/menu/mibtn02r.gif";
imgL[30] = new Image(); imgL[30].src = "../image/menu/mibtn03.gif";
imgL[31] = new Image(); imgL[31].src = "../image/menu/mibtn03r.gif";
imgL[40] = new Image(); imgL[40].src = "../image/menu/mibtn04.gif";
imgL[41] = new Image(); imgL[41].src = "../image/menu/mibtn04r.gif";
}

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