function seltab(bpref, hpref, id_max, selected) {
  if (! document.getElementById) return;
  for (i = 0; i <= id_max; i++) {
    if (! document.getElementById(bpref + i)) continue;
    if (i == selected) {
      document.getElementById(bpref + i).style.display = "block";
      document.getElementById(bpref + i).style.position = "";
      document.getElementById(hpref + i).className = "open";
    } else {
      document.getElementById(bpref + i).style.display = "none";
      document.getElementById(bpref + i).style.position = "absolute";
      document.getElementById(hpref + i).className = "close";
    }
  }
  document.getElementById("selectTab").value = selected;
  setTabImg("selectTab1", 1, 1);
  setTabImg("selectTab2", 2, 1);
  setTabImg("selectTab3", 3, 1);
  setTabImg("selectTab4", 4, 1);
}
function getGetData() {
  url = location.href;
  if (url.indexOf("?",0)==-1){ selected = 1;}
  else{ selected = url.charAt(url.indexOf("?",0)+1); }
  if (selected != 1 && selected != 2){ selected = 1; }
  return selected;
}
function setTabImg(ementId, type, onoff) {
  imgSrc = "images/net/navi_head" + type;
  if (document.getElementById("selectTab").value == type) {
    if (onoff == 2){ imgSrc = imgSrc + "_ov"; }
    else{ imgSrc = imgSrc + "_ot"; }
  }else{
    if (onoff == 2){ imgSrc = imgSrc + "_on"; }
  }
  document.getElementById(ementId).src = imgSrc + ".gif";
}