function tabClick(idx) {

if(idx==1) 
{
  document.all.tabLabel_1.src = "../images/index_31_1.jpg";
  tabContent_1.style.visibility = "visible";
  tabContent_1.style.display = "block";
  
  document.all.tabLabel_2.src = "../images/index_32.jpg";
  tabContent_2.style.visibility = "hidden";
  tabContent_2.style.display = "none";
  
  document.all.tabLabel_3.src = "../images/index_33.jpg";
  tabContent_3.style.visibility = "hidden";
  tabContent_3.style.display = "none";
  
  document.all.tabLabel_4.src = "../images/index_34.jpg";
  tabContent_4.style.visibility = "hidden";
  tabContent_4.style.display = "none";
}

if(idx==2) 
{
  document.all.tabLabel_2.src = "../images/index_32_1.jpg";
  tabContent_2.style.visibility = "visible";
  tabContent_2.style.display = "block";
  
  document.all.tabLabel_1.src = "../images/index_31.jpg";
  tabContent_1.style.visibility = "visible";
  tabContent_1.style.display = "none";
  
  document.all.tabLabel_3.src = "../images/index_33.jpg";
  tabContent_3.style.visibility = "visible";
  tabContent_3.style.display = "none";
  
  document.all.tabLabel_4.src = "../images/index_34.jpg";
  tabContent_4.style.visibility = "visible";
  tabContent_4.style.display = "none";
}

if(idx==3) 
{
  document.all.tabLabel_3.src = "../images/index_33_1.jpg";
  tabContent_3.style.visibility = "visible";
  tabContent_3.style.display = "block";
  
  document.all.tabLabel_1.src = "../images/index_31.jpg";
  tabContent_1.style.visibility = "visible";
  tabContent_1.style.display = "none";
  
  document.all.tabLabel_2.src = "../images/index_32.jpg";
  tabContent_2.style.visibility = "visible";
  tabContent_2.style.display = "none";
  
  document.all.tabLabel_4.src = "../images/index_34.jpg";
  tabContent_4.style.visibility = "visible";
  tabContent_4.style.display = "none";
}

if(idx==4) 
{
  document.all.tabLabel_4.src = "../images/index_34_1.jpg";
  tabContent_4.style.visibility = "visible";
  tabContent_4.style.display = "block";
  
  document.all.tabLabel_1.src = "../images/index_31.jpg";
  tabContent_1.style.visibility = "visible";
  tabContent_1.style.display = "none";
  
  document.all.tabLabel_2.src = "../images/index_32.jpg";
  tabContent_2.style.visibility = "visible";
  tabContent_2.style.display = "none";
  
  document.all.tabLabel_3.src = "../images/index_33.jpg";
  tabContent_3.style.visibility = "visible";
  tabContent_3.style.display = "none";
}
}