帝国用JS增加勾选注册协议，必须勾选注册按钮才可点击

js必选在</form>外面才有用

<div class="reg_checkboxline pos"> <span class="z"><input id="checked" type="checkbox" onclick="confirmBox()"/></i></span> <div class="Validform_checktip"></div> <p>我已阅读并接受(必选) <a href="javascript:void(0)" class="click_pop">《用户注册协议说明》</a></p> </div> <div class="dl-btn"> <input class="lang-btn off log-btn" type='submit' id="submitBtn" name='Submit' value='马上注册' disabled="disabled"> </div> </form><script type="text/javascript">function confirmBox(){ if(document.getElementById("checked").checked==true) { document.getElementById("submitBtn").disabled=""; }else{ document.getElementById("submitBtn").disabled="disabled"; }}</script>

需要注意修改的地方
<input id="checked" type="checkbox"/>
<input class="lang-btn off log-btn" type='submit' id="submitBtn" name='Submit' value='马上注册' disabled="disabled">
disabled="disabled"