通过Javascript onClick更改HTML列表(Li)

Question

我有一个看起来像这样的列表，所以用户应该一个接一个地检查项目，并获得项目是否选中的反馈。

<html>
<head>
    <link href="../../fuctions/style.css" rel="stylesheet" media="screen" type="text/css" />
    <script type="text/javascript" charset="utf-8" src="../../fuctions/cordova-2.3.0.js"></script>
    <script type="text/javascript" charset="utf-8" src="../../fuctions/functions.js"></script>
</head>
<body>
    <div id="topbar">
        <div id="title">
            Engine Run-up
        </div>  
        <div id="leftnav">
            <a href="../../index_aerosoft.html">Home</a>
            <a href="katana_checklist_all.html">Overview</a>
        </div>
        <div id="rightnav">
            <a href="katan_checklist_takeoff.html"id="a_next">Next</a>
        </div>
    </div>
    <div id="content">
        <ul class="pageitem">
            <li class="radiobutton">
                <span class="name">Toe Brakes -<font color="red"> hold</font></span>
                <input name="1" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Safety Belts -<font color="red"> fastened</font></span>
                <input name="2" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Canopy -<font color="red"> closed / locked</font></span>
                <input name="3" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Fuel Pressure Warning Light -<font color="red"> OFF</font></span>
                <input name="4" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Fuel Shut-off Valve -<font color="red"> check OPEN</font></span>
                <input name="5" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Fuel Quantity Indicator -<font color="red"> check</font></span>
                <input name="6" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Engine Gauges -<font color="red"> green range</font></span>
                <input name="7" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Trim -<font color="red"> NEUTRAL</font></span>
                <input name="8" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Controls -<font color="red"> free</font></span>
                <input name="9" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Throttle -<font color="red"> 1700-1800 RPM</font></span>
                <input name="10" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Prop Control Level -<font color="red"> Cycle 3 x (50-250 RPM)</font></span>
                <input name="11" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Ignition Switch - Cycle -<font color="red"> L-BOTH-R-BOTH</font></span>
                <input name="12" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Throttle -<font color="red"> 1500 RPM</font></span>
                <input name="13" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Carburetor Heat -<font color="red"> ON (<50 RPM)</font></span>
                    <input name="14" type="radio" value="other" />
                    </li>
            <li class="radiobutton">
                <span class="name">Throttle -<font color="red"> IDLE</font></span>
                <input name="15" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Carniretor Heat -<font color="red"> OFF</font></span>
                <input name="16" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Corcuit Breakers -<font color="red"> check IN</font></span>
                <input name="17" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Electric Fuel Pump -<font color="red"> ON</font></span>
                <input name="18" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Wing Flaps -<font color="red"> T/O</font></span>
                <input name="19" type="radio" value="other" />
            </li>
            <li class="radiobutton">
                <span class="name">Parking Brake -<font color="red"> release</font></span>
                <input name="20" type="radio" value="other" />
            </li>
        </ul>
    </div>
    <div id="footer">
        <a class="noeffect" href="#" onClick="resetChecklist();">Reset ZYX</a>
        <br /><br />
        <a class="noeffect" href="#" onClick="openXYZDE();">XYZ</a>
    </div>
</body>

​

我想通过JavaScript检查是否选中了其中一个"li“，如果是，它应该将该行更改为”绿色“。

<li class="radiobutton">
  <span class="name">Toe Brakes -<font color="green"> hold</font></span>
  <input name="1" type="radio" value="other" />
</li>

Answer 1

如果jquery是一种选择，那么它就变得非常简单。

function checkChanges()
{
  $('.radiobutton font').attr('color', 'red');

  $('.radiobutton :checked').closest('.radiobutton').find('font').attr('color', 'green');
}

$(function()
{
  checkChanges();
  $('.radiobutton :radio').on('click', checkChanges);
});

尽管我强烈建议删除字体标记，而是向li中添加一个类，例如将字体颜色设置为绿色的radiobutton-checked。

ab代码将所有字体重置为红色，然后找到一个单选按钮，里面有一个选中的单选按钮，迭代回到父单选按钮(closest)，然后找到它的子字体标签并将其颜色设置为绿色。然后，每当单选按钮被单击时，它都会重复上述过程，从而只保留活动选中的单选按钮为绿色。