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) {
    navi01o = newImage("/common/img/navi01o.gif");
    navi02o = newImage("/common/img/navi02o.gif");
    navi03o = newImage("/common/img/navi03o.gif");
    navi04o = newImage("/common/img/navi04o.gif");
    navi05o = newImage("/common/img/navi05o.gif");
    navi06o = newImage("/common/img/navi06o.gif");
    navi07o = newImage("/common/img/navi07o.gif");
    navi08o = newImage("/common/img/navi08o.gif");
    navi09o = newImage("/common/img/navi09o.gif");
    navi10o = newImage("/common/img/navi10o.gif");
    navi11o = newImage("/common/img/navi11o.gif");
    navi12o = newImage("/common/img/navi12o.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,w,h,window_name){
         newWin = window.open(html_url,window_name,
                              "width="+w+",height="+h+",scrollbars=0,status=0,resizable=yes");
}