var currentTab = null;
var currentElementID = "t1";
function SwitchTab(tID)
{            
    if(!currentTab)
        currentTab = document.getElementById('t1');
    var tab = document.getElementById(tID);
    hideE(currentTab);
    showE(tab);
    activateTab(tID);
    deactivateTab(currentTab.id);
    currentTab = tab; 
    currentElementID = tID;                     
}

function showE(elm)
{
    elm.style.display="block";            
}

function hideE(elm)
{
    elm.style.display="none";
}

function activateTab(tID)
{
    document.getElementById(tID+"c1").className="tabc1on";
    document.getElementById(tID+"m").className="tabMidon";
    document.getElementById(tID+"c2").className="tabc2on";    
}

function deactivateTab(tID)
{
    document.getElementById(tID+"c1").className="tabc1";
    document.getElementById(tID+"m").className="tabMid";
    document.getElementById(tID+"c2").className="tabc2";
}