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copied!<p>Assuming that you are using the jQuery <a href="http://bassistance.de/jquery-plugins/jquery-plugin-validation/" rel="nofollow noreferrer">validation plugin</a>, you could set/clear the class of each of the controls in the required/not required sections based on the checkbox that was clicked. </p> <pre><code>$(document).ready( function() { $('form').validate(); } ); function init_validation(divName) { $('div#' + divName).find('input').addClass( 'required' ); $('div#inputs').children('div:not(#' + divName + ')') .find('input') .removeClass( 'required' ); } </code></pre> <p>HTML:</p> <pre><code><form> <div> <input type='radio' id='new_account_radio' name='interface_selector' value='new_account' selected=true onclick='init_validation("new_account");' /> New Account <input type='radio' id='delete_account_radio' name='interface_selector' value='delete_account' onclick='init_validation("delete_account");' /> Delete Account <input type='radio' id='new_software_radio' name='interface_selector' value='new_software' onclick='init_validation("new_software");' /> New Software </div> <div id='inputs'> <div id='new_account'> <input type='text' id='new_account_name' class='required' /> </div> <div id='delete_account'> <input type='text' id='delete_account_name' /> </div> <div id='new_software'> <input type='text' id='new_software_name' /> </div> </div> </form> </code></pre>

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