Get an input's "checked" state

I have this basic HTML structure:

<fieldset>
    <input/>
    <label></label>
    <div class="toggle_box">
        <div class="switch"></div>
    </div>
</fieldset>

I would like this to happen when my input is checked:

<fieldset>
    <input checked="checked" />
    <label></label>
    <div class="toggle_box">
        <div class="switch" state="on"></div>
    </div>
</fieldset>

Add state="on" to the switch div. Is there any selector in jquery I can use to get the checked state of that particular input? (there are multiple on a page).

Thanks for your brainstorming!

This works; you'll need to add type="checkbox" to your inputs to make them checkboxes. (Observe the effect by inspecting the switch divs with Chrome's Dev Tools or Firebug.)

$('fieldset input[type=checkbox]').change(function() {
    var el=$(this).parent().find('.switch');
    if ($(this).is(':checked')) el.attr('state','on');
    else el.removeAttr('state');
});

You can put all these divs inside another div, and then get the father div with*document.getElementById*, find the div you want in the content and change him.

<div id="fatherOfTheDivs">
        <fieldset>
            <input/>
            <label></label>
            <div class="toggle_box">
                <div id="div1" class="switch"></div>
            </div>
        </fieldset>

        <fieldset>
            <input/>
            <label></label>
            <div id="div2" class="toggle_box">
                <div class="switch"></div>
            </div>
        </fieldset>
</div> 

This will accomplish it for you.

$('input:checkbox').change(function () {
    if ($(this).is(':checked')) {
        $(this).parent().children('div.toggle_box').children('div.switch').attr('state', 'on');
    } else {
        $(this).parent().children('div.toggle_box').children('div.switch').removeAttr('state');
    }
});

You'll also have to modify your <input /> to <input type="checkbox" />