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Show / hide a text file depending on the choice of radio buttons

I know this is a recurring question, but I can't get it to work. I tried all the solutions I found here in SO and googling ...

I have this button form on my page. I want that when the user selects the "only one participant" option, ONLY a text field appears for this parameter. If the user selects another, he disappears.

Normal form

As soon as the user selects only one parameter, a text box appears.

expanded form

I tried to do with javascript. I use this piece of code

<script>
    $(document).ready(function()
        $("#send_to_one").hide();
        $("input:radio[name="people"]").change(function(){  
          if(this.checked){
            if(this.value =='one'){
              $("#send_to_one").show()
            }else{
              $("#send_to_one").hide();
            }
         }
    }
  });
</script>

Form code

  <div id="send_to">
    <input type="radio" id="send_poll" name="people" value="all" checked="checked">all the attendees</br>      
    <input type="radio" id="send_poll" name="people" value="one" >only one attendee<br/>
    <div id="send_to_one">
      <label>Write the attendee name: </label><input type="text" id="attendeename"><br/><br/>
    </div>
    <input type="radio" id="send_poll" name="people" value="group">a group of attendees</br>              
  </div>

, javascript. javascript- html.erb, , .js application.htm.erb <head></head>, . , ?

Rails 3.0.4, Ruby 1.8.9. JQuery

+5
2

LIVE DEMO

HTML:

<div id="send_to">
  <input type="radio" id="send_poll" name="people" value="all" checked="checked" />all the attendees<br/>      
  <input type="radio" id="send_poll" name="people" value="one" />only one attendee<br/>
  <div id="send_to_one">
      <label>Write the attendee name: </label><input type="text" id="attendeename" /><br/><br/>
  </div>
  <input type="radio" id="send_poll" name="people" value="group" />a group of attendees<br/>              
</div>

JQ:

$(document).ready(function(){

    $("#send_to_one").hide();

    $("input:radio[name='people']").change(function(){  

            if(this.value == 'one' && this.checked){
              $("#send_to_one").show();
            }else{
              $("#send_to_one").hide();
            }

    });

});
+4
$(document).ready(function() {
    $("#send_to_one").hide();
    $("input:radio[name='people']").change(function(){  
         if(this.checked){
            if(this.value =='one'){
              $("#send_to_one").show()
            }else{
              $("#send_to_one").hide();
            }
         } 
    });
});

, , . - javascript? ...

http://jsfiddle.net/7yt2A/

+1

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