function handleBackButton()
{
    history.go(+1);
}
    function DontGoBack()
    {
        if (document.getElementById('fBackButton'))
        {
            if (document.getElementById('fBackButton').value!='0')
            {
             //alert('You have used the browsers BACK button');
             parent.location.href="index.htm";
            }
            document.getElementById('fBackButton').value='1';
            document.getElementById('fBackButton').defaultValue='1';
        }
    }