很抱歉原帖不清楚。
我试图在未选中底部复选框时隐藏前两个表单字段区域，并且在隐藏任何值时不传递任何值。它是wordpress的注册表单，我不想修改html，这会使它变得更容易，因为我可以接下来div中的标签和输入来隐藏。
此处显示ID：
（顶部复选框） WS-插件 - s2member定制-REG-场通讯 （中间电台） WS-插件 - s2member定制-REG-场jobalerts （底部复选框ID） WS-插件 - s2member定制-REG-场选择在
@Mosh下面的建议很接近，但只隐藏了一个。
// Store the `p` node which contains the label.
var collapseParent = $('label[for="ws-plugin--s2member-custom-reg-field-jobalerts"]').parent();
// Store the `checkbox` that we want to "listen" to
var checkbox = $('[name="ws_plugin__s2member_custom_reg_field_opt_in"]');
// Attach the `change` event on the checkbox and trigger the event so it will fire on page load
checkbox.change(toggle).trigger('change');
// show/hide the `p` node depeneds if the checbox was checked or not
function toggle() {
collapseParent.toggle(checkbox.is(':checked'));
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>
<label for="ws-plugin--s2member-custom-reg-field-newsletters">
<span style="display:none;">Do you wish to receive JETAAUK Newsletters? *</span>
</label>
<input type="checkbox" value="1" checked="checked" name="ws_plugin__s2member_custom_reg_field_newsletters" id="ws-plugin--s2member-custom-reg-field-newsletters" aria-required="true" tabindex="59" class="ws-plugin--s2member-custom-reg-field s2conditional1">
<label for="ws-plugin--s2member-custom-reg-field-newsletters" style="display:inline !important; margin:0 !important;">Do you wish to receive JETAAUK Newsletters?</label>
</p>
<p>
<label for="ws-plugin--s2member-custom-reg-field-jobalerts">
<span>Do you wish to receive job alerts (digest)? *</span>
</label>
<br>
<input type="radio" value="weekly" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---0" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;">
<label for="ws-plugin--s2member-custom-reg-field-jobalerts-0" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">weekly</label>
<input type="radio" value="daily" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---1" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;">
<label for="ws-plugin--s2member-custom-reg-field-jobalerts-1" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">daily</label>
<input type="radio" value="none" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---2" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;">
<label for="ws-plugin--s2member-custom-reg-field-jobalerts-2" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">none</label>
</p>
<p>
<label for="ws-plugin--s2member-custom-reg-field-opt-in">
<input type="checkbox" name="ws_plugin__s2member_custom_reg_field_opt_in" id="ws-plugin--s2member-custom-reg-field-opt-in" class="ws-plugin--s2member-custom-reg-field" value="1" checked="not" tabindex="70">
<span style="color:#be0026;"><strong>=> Yes, I wish to receive JETAAUK Newsletters via email <= </strong></span>
</label>
</p>
答案 0 :(得分：2)
这段代码有点难看，但这是不改变html的“成本”。
请阅读代码中的注释，以便了解我的所作所为。
如果要对其他复选框/单选按钮执行此功能，只需更改元素的选择器（标签/复选框或p节点）
// Store the `p` node which contains the label.
var collapseParent = $('label[for="ws-plugin--s2member-custom-reg-field-jobalerts"]').parent();
// Store the `checkbox` that we want to "listen" to
var checkbox = $('[name="ws_plugin__s2member_custom_reg_field_newsletters"]');
// Attach the `change` event on the checkbox and trigger the event so it will fire on page load
checkbox.change(toggle).trigger('change');
// show/hide the `p` node depeneds if the checbox was checked or not
function toggle() {
collapseParent.toggle(checkbox.is(':checked'));
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>
<label for="ws-plugin--s2member-custom-reg-field-newsletters">
<span style="display:none;">Do you wish to receive JETAAUK Newsletters? *</span></label>
<input type="checkbox" value="1" checked="checked" name="ws_plugin__s2member_custom_reg_field_newsletters" id="ws-plugin--s2member-custom-reg-field-newsletters" aria-required="true" tabindex="59" class="ws-plugin--s2member-custom-reg-field s2conditional1"> <label for="ws-plugin--s2member-custom-reg-field-newsletters" style="display:inline !important; margin:0 !important;">Do you wish to receive JETAAUK Newsletters?</label></p>
<p>
<label for="ws-plugin--s2member-custom-reg-field-jobalerts">
<span>Do you wish to receive job alerts (digest)? *</span></label><br>
<input type="radio" value="weekly" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---0" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;"> <label for="ws-plugin--s2member-custom-reg-field-jobalerts-0" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">weekly</label> <input type="radio" value="daily" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---1" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;"> <label for="ws-plugin--s2member-custom-reg-field-jobalerts-1" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">daily</label> <input type="radio" value="none" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---2" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;"> <label for="ws-plugin--s2member-custom-reg-field-jobalerts-2" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">none</label></p>
<p>
<label for="ws-plugin--s2member-custom-reg-field-opt-in">
<input type="checkbox" name="ws_plugin__s2member_custom_reg_field_opt_in" id="ws-plugin--s2member-custom-reg-field-opt-in" class="ws-plugin--s2member-custom-reg-field" value="1" checked="not" tabindex="70">
<span style="color:#be0026;"><strong>=> Yes, I wish to receive JETAAUK Newsletters via email <= </strong></span></label></p>
答案 1 :(得分：0)
为了隐藏两个额外的表单部分，您需要使用JavaScript。我个人使用jQuery插件，从你对Mosh Feu的回答的评论来看，这不会是一个问题。
代码不是最佳代码，但由于您无法更改HTML，我们将使用我们的代码。
// Store the checkbox we'll be monitoring for changes
var checkTrigger = $('#ws-plugin--s2member-custom-reg-field-opt-in');
// Store the items we want to show/hide
// I store the 'none' radio button here - if the HTML changes, this will break
// we use this particular radio button further down
var jobAlerts = $('#ws-plugin--s2member-custom-reg-field-jobalerts---2');
var newsletterCheck = $('#ws-plugin--s2member-custom-reg-field-newsletters');
// Check for the change of the checkbox
checkTrigger.change(function() {
toggleForm(checkTrigger.is(':checked'));
});
// Toggle the form
function toggleForm(isChecked) {
jobAlerts.parent().toggle(isChecked);
newsletterCheck.parent().toggle(isChecked);
// We'll uncheck the red Newsletter checkbox too, if it's being hidden
// and we'll set the job alerts to none;
if (!isChecked) {
newsletterCheck.prop("checked", false);
jobAlerts.prop("checked", true);
}
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>
<label for="ws-plugin--s2member-custom-reg-field-newsletters">
<span style="display:none;">Do you wish to receive JETAAUK Newsletters? *</span>
</label>
<input type="checkbox" value="1" checked="checked" name="ws_plugin__s2member_custom_reg_field_newsletters" id="ws-plugin--s2member-custom-reg-field-newsletters" aria-required="true" tabindex="59" class="ws-plugin--s2member-custom-reg-field s2conditional1">
<label for="ws-plugin--s2member-custom-reg-field-newsletters" style="display:inline !important; margin:0 !important;">Do you wish to receive JETAAUK Newsletters?</label>
</p>
<p>
<label for="ws-plugin--s2member-custom-reg-field-jobalerts">
<span>Do you wish to receive job alerts (digest)? *</span>
</label>
<br>
<input type="radio" value="weekly" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---0" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;">
<label for="ws-plugin--s2member-custom-reg-field-jobalerts-0" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">weekly</label>
<input type="radio" value="daily" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---1" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;">
<label for="ws-plugin--s2member-custom-reg-field-jobalerts-1" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">daily</label>
<input type="radio" value="none" name="ws_plugin__s2member_custom_reg_field_jobalerts" id="ws-plugin--s2member-custom-reg-field-jobalerts---2" aria-required="true" tabindex="60" class="ws-plugin--s2member-custom-reg-field s2conditional2" style="color:#006699;">
<label for="ws-plugin--s2member-custom-reg-field-jobalerts-2" class="ws-plugin--s2member-custom-reg-field-op-l" style="display:inline !important; margin:0 !important;">none</label>
</p>
<p>
<label for="ws-plugin--s2member-custom-reg-field-opt-in">
<input type="checkbox" name="ws_plugin__s2member_custom_reg_field_opt_in" id="ws-plugin--s2member-custom-reg-field-opt-in" class="ws-plugin--s2member-custom-reg-field" value="1" checked="not" tabindex="70">
<span style="color:#be0026;"><strong>=> Yes, I wish to receive JETAAUK Newsletters via email <= </strong></span>
</label>
</p>
jQuery代码假定HTML不会改变。如果复选框的ID值发生变化，那么jQuery将会中断。
我知道你不想在这里更改HTML，但是从UI的角度来看，底部的复选框隐藏了它上面的那些是没有意义的。用户从左到右，从上到下阅读，底部的复选框与其上方的元素进行交互，这个一般规则被打破。
您应该考虑将触发复选框移到顶部。