Bootstrap radio button: Get selected value on submit form

Question

I have the next boostrap radio-button:

<div class="btn-group" id="filterDay" data-toggle="buttons">
       <label class="btn btn-default blue">
         <input type="radio" class="toggle" value="1">Monday
       </label>
       <label class="btn btn-default blue">
         <input type="radio" class="toggle" value="2"> Tuesday
       </label>
       <label class="btn btn-default blue">
         <input type="radio" class="toggle" value="3"> Wednesday
       </label>
       <label class="btn btn-default blue">
         <input type="radio" class="toggle" value="4"> Thursday
       </label>
       <label class="btn btn-default blue">
          <input type="radio" class="toggle" value="5"> Friday
       </label>
       <label class="btn btn-default blue">
           <input type="radio" class="toggle" value="6"> Saturday
        </label>
       <label class="btn btn-default blue active">
           <input type="radio" class="toggle" value="0"> Sunday
       </label>
</div>

I'm trying to get value of the active button when I submit the form, without creating an "onclick" event, simply getting the active button from the $('#filterDay') button group. Should be easy but I'm not finding a way to get the value. I tried several examples but any worked.

Could someone help?

Thank you!

Update:

This is the html "printed" code:

<label class="btn btn-default blue">
   <input type="radio" class="toggle" value="6"> Saturday
</label>    
<label class="btn btn-default blue active">
        <input type="radio" class="toggle" value="0"> Sunday
</label>

The "active" in the class is what is changing when I click the button.

Answer 1

In the form submit handler use the :checked selector

var filterDay = $('#filterDay input:radio:checked').val()

Answer 2

You should set a common "name" to identify the form:

<div class="btn-group" id="filterDay" data-toggle="buttons">
   <label class="btn btn-default blue">
     <input type="radio" class="toggle" name="toggle" value="1">Monday
   </label>
   <label class="btn btn-default blue">
     <input type="radio" class="toggle" name="toggle" value="2"> Tuesday
   </label>
   <label class="btn btn-default blue">
     <input type="radio" class="toggle" name="toggle" value="3"> Wednesday
   </label>
   <label class="btn btn-default blue">
     <input type="radio" class="toggle" name="toggle" value="4"> Thursday
   </label>
   <label class="btn btn-default blue">
      <input type="radio" class="toggle" name="toggle" value="5"> Friday
   </label>
   <label class="btn btn-default blue">
       <input type="radio" class="toggle" name="toggle" value="6"> Saturday
    </label>
   <label class="btn btn-default blue active">
       <input type="radio" class="toggle" name="toggle" value="0"> Sunday
   </label>
</div>

And to get the value, you can get like this:

$('input[name=toggle]:checked').val()

Answer 3

Try this out, It should solve your problem.

$( "input:checked" ).val()

you can refer the link below for more details:
http://api.jquery.com/checked-selector/