function tabClick( idx ) {

if(idx == 1 ) 
{
  document.all.tabLabel__1.src = "images/demo2_52.gif";
  tabContent__1.style.visibility = "visible";
  tabContent__1.style.display = "block";
  
  document.all.tabLabel__2.src = "images/demo_53.gif";
  tabContent__2.style.visibility = "hidden";
  tabContent__2.style.display = "none";
  
  document.all.tabLabel__3.src = "images/demo_54.gif";
  tabContent__3.style.visibility = "hidden";
  tabContent__3.style.display = "none";
}

if(idx == 2 ) 
{
  document.all.tabLabel__1.src = "images/demo_52.gif";
  tabContent__1.style.visibility = "hidden";
  tabContent__1.style.display = "none";
  
  document.all.tabLabel__2.src = "images/demo2_53.gif";
  tabContent__2.style.visibility = "visible";
  tabContent__2.style.display = "block";
  
  document.all.tabLabel__3.src = "images/demo_54.gif";
  tabContent__3.style.visibility = "hidden";
  tabContent__3.style.display = "none";
}

if(idx == 3 ) 
{
  document.all.tabLabel__1.src = "images/demo_52.gif";
  tabContent__1.style.visibility = "hidden";
  tabContent__1.style.display = "none";
  
  document.all.tabLabel__2.src = "images/demo_53.gif";
  tabContent__2.style.visibility = "hidden";
  tabContent__2.style.display = "none";
  
  document.all.tabLabel__3.src = "images/demo2_54.gif";
  tabContent__3.style.visibility = "visible";
  tabContent__3.style.display = "block";
}
}