// Disables the Control Passed.
function disableControl(id)
{
    var btn = document.getElementById(id);
    btn.disabled = true;
}


// Clears the TextBox Passed.
function ClearTextBox(textBox)
    {
        e = document.getElementById(textBox);
        e.value="";
    }
    
// Clears the Log in Box
function ClearLoginBox(origPrompt)
    {
        e = document.getElementById('cardNumber');
        if (e.value == origPrompt)
            ClearTextBox('cardNumber');
    }