function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    menu01o = newImage("images/menu01o.gif");
    menu02o = newImage("images/menu02o.gif");
    menu03o = newImage("images/menu03o.gif");
    menu04o = newImage("images/menu04o.gif");
    menu05o = newImage("images/menu05o.gif");
    menu06o = newImage("images/menu06o.gif");
    menu07o = newImage("images/menu07o.gif");
    menu08o = newImage("images/menu08o.gif");
    menu09o = newImage("images/menu09o.gif");
    menu10o = newImage("images/menu10o.gif");
    menu11o = newImage("images/menu11o.gif");
    menu12o = newImage("images/menu12o.gif");
    menu13o = newImage("images/menu13o.gif");
    menu14o = newImage("images/menu14o.gif");
    menu15o = newImage("images/menu15o.gif");
    menu16o = newImage("images/menu16o.gif");
    menu17o = newImage("images/menu17o.gif");
    menu18o = newImage("images/menu18o.gif");
    menu19o = newImage("images/menu19o.gif");
    menu20o = newImage("images/menu20o.gif");
    menu21o = newImage("images/menu21o.gif");
    menu22o = newImage("images/menu22o.gif");
    menu23o = newImage("images/menu23o.gif");
    menu24o = newImage("images/menu24o.gif");
    botan01o = newImage("images/botan01o.gif");
    botan02o = newImage("images/botan02o.gif");
    botan03o = newImage("images/botan03o.gif");
    preloadFlag = true;
  }
}
function open_window(html_url,w,h,window_name){
         newWin = window.open(html_url,window_name,
                              "width="+w+",height="+h+",scrollbars=1,status=0,resizable=yes");
}
function open_window2(html_url,window_name){
         newWin = window.open(html_url,window_name);
}

function quick_navi() {
   var popup_obj=document.urlctrl.sub_menu;
   var htmlf=popup_obj.options[popup_obj.selectedIndex].value;
   if(htmlf!="#"){ location.href=htmlf; }
}