CODE 1:
<p style="text-align: center;"><input type="checkbox" id="AgreeCheckBox" onclick="EnableButton()">I Agree</p>

CODE 2:
<p style="text-align: center;">
                <input type="submit" name="ctl00$cphRoblox$ButtonAgree" value="Reactivate My Account" id="ctl00_cphRoblox_ButtonAgree" disabled="disabled" class="translate">
            </p>