function ClickTab(tabID)
{ 
    if(document.getElementById("tabEvents") != null && document.getElementById("tabNews") != null )
    {
        switch(tabID)
        {
        case 1:
            document.getElementById("tabEvents").style.display = "";             
            document.getElementById("tabNews").style.display = "none";
            document.getElementById("spanEvents").className = "on";
            document.getElementById("spanNews").className = "off";
            document.getElementById("spanEvents").innerHTML = "<p>" + tabEvents + "</p>";
            document.getElementById("spanNews").innerHTML = "<p><a href=\"\" onclick=\"ClickTab(2);return false;\">" + tabNews + "</a></p>";
            break;
        case 2:
            document.getElementById("tabEvents").style.display = "none"; 
            document.getElementById("tabNews").style.display = "";
            document.getElementById("spanEvents").className = "off";
            document.getElementById("spanNews").className = "on";
            document.getElementById("spanEvents").innerHTML = "<p><a href=\"\" onclick=\"ClickTab(1);return false;\">" + tabEvents + "</a></p>";
            document.getElementById("spanNews").innerHTML = "<p>" + tabNews + "</p>";
            break;
        default:
            break;
        } 
    }
}