function showOtherTextBox(dropdownObj, textBoxId)
{
    var textBoxObj = document.getElementById(textBoxId);
    if (dropdownObj.options[dropdownObj.selectedIndex].value == "_other")
    {
        showObject(textBoxObj);
        textBoxObj.focus();
    }
    else
        hideObject(textBoxObj);
}

function hideObject(obj)
{
    obj.style.visibility = 'hidden';
    obj.style.display = 'none';
}

function showObject(obj)
{
    obj.style.visibility = 'visible';
    obj.style.display = 'block';
}