/*  Tab JavaScript, version 0.1.0
 *  (c)I.S.T Pro 2007-06-09
 */
function changeTab(ta) {
 if( ta.id == "tab1" ){
  $("tab2").className = "taboff";
  $("tab3").className = "taboff";
  $("keyword").style.display = "none";
  $("city").style.display = "none";
  $("area").style.display = "none";
  $("line").style.display = "";
  $("station").style.display = "";
 }
 if( ta.id == "tab2" ){
  $("tab1").className = "taboff";
  $("tab3").className = "taboff";
  $("keyword").style.display = "none";
  $("line").style.display = "none";
  $("station").style.display = "none";
  $("city").style.display = "";
  $("area").style.display = "";
 }
 if( ta.id == "tab3" ){
  $("tab1").className = "taboff";
  $("tab2").className = "taboff";
  $("line").style.display = "none";
  $("station").style.display = "none";
  $("city").style.display = "none";
  $("area").style.display = "none";
  $("keyword").style.display = "";
 }
 ta.className = "tabon";
}