How to output the price when clicking the radio button?

Question

<fieldset style="width:240 px">
   <legend>Food order</legend>
   <fieldset style="width:240 px">
   <legend>Nasi Lemak</legend> 
   
   <p>
    <input type="radio"  name="j"  value="2"
    onclick="calculate();" />
    <label for='small' class="inlinelabel">
    Small</label>
     (RM2)
   </p>

   <p>
    <input type="radio"  name="j"  value="3"
    onclick="calculate();" />
    <label for='regular' class="inlinelabel">
    Regular</label>
     (RM3)
   </p>

   <p>
    <input type="radio" name="j"   value="4"
    onclick="calculate();" />
    <label for='large' class="inlinelabel">
    Large</label>
     (RM4)
   </p>



   <tr>
    <td>Price = </td>
    <td><output type="number" name="price" id="output"></output></td>
   </tr>
 

   </fieldset>





<script type="text/javascript">
            calculate()
{

}
      

</script>

Does anyone know how to output the price when clicking the radio button ? Let say if i choose Small then it will display the output Rm2...for example Price = Rm 2....i have no idea how to continue it...i will very appreciate it if someone help me solve this...thanks ~

You won't be able to do this with only html. It would require some javascript — pstenstrm, Nov 08 '14 at 12:20

score 4 · Accepted Answer · answered Nov 08 '14 at 12:30

You can pass as parameter this in calculate function(this refers to the element).

Using jquery:

function calculate(obj) {
  $("output").text(obj.value);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<fieldset style="width:240 px">
  <legend>Food order</legend>
  <fieldset style="width:240 px">
    <legend>Nasi Lemak</legend>

    <p>
      <input type="radio" name="j" value="2" onclick="calculate(this);" />
      <label for='small' class="inlinelabel">
        Small</label>
      (RM2)
    </p>

    <p>
      <input type="radio" name="j" value="3" onclick="calculate(this);" />
      <label for='regular' class="inlinelabel">
        Regular</label>
      (RM3)
    </p>

    <p>
      <input type="radio" name="j" value="4" onclick="calculate(this);" />
      <label for='large' class="inlinelabel">
        Large</label>
      (RM4)
    </p>



    <tr>
      <td>Price =</td>
      <td>
        <output type="number" name="price" id="output"></output>
      </td>
    </tr>


  </fieldset>

Using plain js:

function calculate(obj) {
  document.getElementById("output").innerHTML = obj.value;
}

<fieldset style="width:240 px">
  <legend>Food order</legend>
  <fieldset style="width:240 px">
    <legend>Nasi Lemak</legend>

    <p>
      <input type="radio" name="j" value="2" onclick="calculate(this);" />
      <label for='small' class="inlinelabel">
        Small</label>
      (RM2)
    </p>

    <p>
      <input type="radio" name="j" value="3" onclick="calculate(this);" />
      <label for='regular' class="inlinelabel">
        Regular</label>
      (RM3)
    </p>

    <p>
      <input type="radio" name="j" value="4" onclick="calculate(this);" />
      <label for='large' class="inlinelabel">
        Large</label>
      (RM4)
    </p>



    <tr>
      <td>Price =</td>
      <td>
        <output type="number" name="price" id="output"></output>
      </td>
    </tr>


  </fieldset>

vmontanheiro · Answer 2 · 2014-11-08T12:34:05.893

0

Try it

document.getElementsByName("j").addEventListener("change", function(){
      document.getElementById("price").innerHTML = this.value;// Show the value in output element

      //or

    var myRadioValue= this.value; //for some calculate
});

edited Nov 08 '14 at 12:34

answered Nov 08 '14 at 12:24

vmontanheiro

1,009
9
12

put inside the calculate(){} ? – Trojan_Horse Nov 08 '14 at 12:29
Dont need. This implementation takes the radio value and show in the . If you want to work with that values. You can use this.value inside de change event. I ll edit. – vmontanheiro Nov 08 '14 at 12:31
You dont need the onclick event anymore. – vmontanheiro Nov 08 '14 at 12:34

How to output the price when clicking the radio button?

2 Answers2

Linked