/**
 * Sets e-mail input field to default value.
 * @param pEmailInputElement e-mail text input
 * @param pRegisterActionStr indication which form action has just been submitted
 * @param pRegisterFormNameStr which form this function is called from
 */
function defaultEmailValue(pEmailInputElement, pRegisterActionStr, pRegisterFormNameStr, message)
{
    //e-mail element asserted
    //  & its value is blank
    //  or it is not in the form corresponding to the most recent action
    if (pEmailInputElement != null
        && pEmailInputElement != undefined
        && (pEmailInputElement.value == null
            || pEmailInputElement.value == undefined
            || pEmailInputElement.value == ""
            || pRegisterActionStr != pRegisterFormNameStr
        )
    ) {
        pEmailInputElement.value = message;
    }
}

function clearDefaultEmailValue(pEmailInputElement, message)
{
    if(pEmailInputElement.value == message) {
        pEmailInputElement.value = "";
    }
}