function jumpPage(goLang){
  var goLang
  var chkURL
  var jumpURL

chkURL = new String(document.location);
if (goLang == "eng"){jumpURL=chkURL.replace("jpn/","eng/");}
else{jumpURL=chkURL.replace("eng/","jpn/");}
//jumpURL=chkURL;

//alert(jumpURL)
window.open(jumpURL,"_self");
}