var backHTML;

function switchTab(newTab){
  var tabs = document.getElementsByTagName("li");
  for(i=0;i<tabs.length;i++) {
    if (tabs[i].id.indexOf("st") != 0) continue;
    if (tabs[i].className=="current"){
      tabs[i].className="";
      tabs[i].innerHTML = backHTML;
    }
  }
  for(i=0;i<tabs.length;i++) {
    if (tabs[i].id.indexOf("st") != 0) continue;
    if (tabs[i].id == "st" + newTab || (!newTab)) {
      newTab = tabs[i].id.substring(2);
      tabs[i].className="current";
      backHTML = tabs[i].innerHTML;
      tabs[i].innerHTML=tabs[i].getElementsByTagName("a")[0].innerHTML;
    }
  }
  var forms = document.getElementsByTagName("form");
  for(i=0;i<forms.length;i++) {
    if (forms[i].id.indexOf("sb") != 0) continue;
    if(forms[i].id == "sb"+newTab) forms[i].style.display = "block";
    else forms[i].style.display = "none"; 
    }
}