function getElementsByClassName(className, parentElement){
var elems = (document.getElementById(parentElement)||document.body).getElementsByTagName("*");
var result=[];
for (i=0; j=elems[i]; i++){
   if ((" "+j.className+" ").indexOf(" "+className+" ")!=-1){
result.push(j);
   }
}
return result;
}

function show(ct,num,t){
  var lis=t.parentNode.getElementsByTagName("li");
  for(var i=0;i<lis.length;i++){
    lis[i].className="";
  }
  t.className="active";
  t.blur();
  var tabs=getElementsByClassName("tabs",ct);
  for(var i=0;i<tabs.length;i++){
    tabs[i].style.display="none";
	tabs[num-1].style.display="block";
  }
}