test check radio buttons
by mobilat
HTML
<input type="checkbox" name="sameAsShipping" class="checkbox" id="checkbox4">
<div id="checkout-shipping-address">
CLICK THE CHECKBOX TO HIDE ME!
</div>
JavaScript
$(document).ready(function() {
$("#checkbox4").click(function() {
$("#checkout-shipping-address").toggle(this.checked);
}).triggerHandler('click');
});