function OLDChangeTab(sTab)
{
    if (sTab == "t1")
        document.getElementById('tab').className = 't1';
    else if (sTab == "t2")
        document.getElementById('tab').className = 't2';
    else if (sTab == "t3")
        document.getElementById('tab').className = 't3';
}

function ChangeTab(sTab)
{
    if (sTab == "t1")
    {
        document.getElementById('tab1').style.visibility = "visible";
        document.getElementById('tab1').style.display = "block";
        
        document.getElementById('tab2').style.visibility = "hidden";
        document.getElementById('tab2').style.display = "none";
        
        document.getElementById('tab3').style.visibility = "hidden";
        document.getElementById('tab3').style.display = "none";
        
        document.getElementById('location').style.visibility = "hidden";
        document.getElementById('location').style.display = "none";
        
        document.getElementById('product').style.visibility = "hidden";
        document.getElementById('product').style.display = "none";
    }
    else if (sTab == "t2")
    {
        document.getElementById('tab2').style.visibility = "visible";
        document.getElementById('tab2').style.display = "block";
        
        document.getElementById('tab1').style.visibility = "hidden";
        document.getElementById('tab1').style.display = "none";
        
        document.getElementById('tab3').style.visibility = "hidden";
        document.getElementById('tab3').style.display = "none";
        
        document.getElementById('location').style.visibility = "visible";
        document.getElementById('location').style.display = "block";
        
        document.getElementById('product').style.visibility = "hidden";
        document.getElementById('product').style.display = "none";
    }
    else if (sTab == "t3")
    {
        document.getElementById('tab3').style.visibility = "visible";
        document.getElementById('tab3').style.display = "block";
        
        document.getElementById('tab2').style.visibility = "hidden";
        document.getElementById('tab2').style.display = "none";
        
        document.getElementById('tab1').style.visibility = "hidden";
        document.getElementById('tab1').style.display = "none";
        
        document.getElementById('location').style.visibility = "hidden";
        document.getElementById('location').style.display = "none";
        
        document.getElementById('product').style.visibility = "visible";
        document.getElementById('product').style.display = "block";
    }
}