I have an html table that has a name and a radio button like so:

<table id="cars">
  <thead>
    <tr>
      <th>Car Name</th>
      <th></th>
    </tr>
  </thead>
  <tbody>

    <tr>
      <td class="car">Ford Focus</td>
      <td><input type="radio" id="selectedCar" name="selectedCar" value="8398"></td>
    </tr>

    <tr>
      <td class="car">Lincoln Navigator</td>
      <td><input type="radio" id="selectedCar" name="selectedCar" value="2994"></td>
    </tr>

  </tbody>
</table>
<input type="button" value="Select Car" onclick="selectCar()"></input>

I want to be able to select a radio button, then click another button and get the value of the radio button (which is a unique ID) as well as the car name text (like Ford Focus). How should I code the selectCar method? I've tried a few things like:

val1 = $('tr input[name=selectedCar]:checked').parent().find('#cars').html();
val1 = $("td input[name='selectedCar']:checked").parents().find('.cars').html();
val1 = $('selectedCar').checked;

but I can't get the proper values.

I'm using prototype, but the solution can be plain Javascript as well.

I have an html table that has a name and a radio button like so:

<table id="cars">
  <thead>
    <tr>
      <th>Car Name</th>
      <th></th>
    </tr>
  </thead>
  <tbody>

    <tr>
      <td class="car">Ford Focus</td>
      <td><input type="radio" id="selectedCar" name="selectedCar" value="8398"></td>
    </tr>

    <tr>
      <td class="car">Lincoln Navigator</td>
      <td><input type="radio" id="selectedCar" name="selectedCar" value="2994"></td>
    </tr>

  </tbody>
</table>
<input type="button" value="Select Car" onclick="selectCar()"></input>

I want to be able to select a radio button, then click another button and get the value of the radio button (which is a unique ID) as well as the car name text (like Ford Focus). How should I code the selectCar method? I've tried a few things like:

val1 = $('tr input[name=selectedCar]:checked').parent().find('#cars').html();
val1 = $("td input[name='selectedCar']:checked").parents().find('.cars').html();
val1 = $('selectedCar').checked;

but I can't get the proper values.

I'm using prototype, but the solution can be plain Javascript as well.

• javascript
• html
• radio-button
• html-table
• prototypejs

• IDs of elements have to be unique! – Marcel Korpel Commented Jun 8, 2010 at 17:03
• @Marcel Korpel So if the ID has to be unique, how can I see which one is checked? The table is built dynamically and could have many rows so I need any easy way to loop through them to see which one was checked and get the corresponding info. – David Buckley Commented Jun 8, 2010 at 17:05

1 Answer 1

All IDs have to be unique!

You can try with this HTML:

<tr>
  <td class="car">Ford Focus</td>
  <td><input type="radio" id="selectedCar1" name="selectedCar" value="8398"></td>
</tr>

<tr>
  <td class="car">Lincoln Navigator</td>
  <td><input type="radio" id="selectedCar2" name="selectedCar" value="2994"></td>
</tr>

After this, you can test using:

val1 = $('selectedCar1').checked;

(returns true or false).

Or, if you want to grab the selected value, use getElementsByName:

function getCarValue()
{
    var theCars = document.getElementsByName("selectedCar");
    var i = theCars.length;
    while (i--) {
        if(theCars[i].checked)
             return theCars[i].value;

    }
}