sabnzbd/interfaces/wizard/static/javascript/pagetwo.js

function toggleWebPass()
{
  var web
  web = $('#enable_webpass').attr('checked')
  if ($('#enable_webpass').attr('checked') == 1)
  {
    $('#web_user').attr("disabled","");
    $('#web_pass').attr("disabled","");

  } else {
    $('#web_user').attr("disabled","disabled");
    $('#web_pass').attr("value","");
    $('#web_pass').attr("disabled","disabled");
    $('#web_user').attr("value","");
  }
};

$(document).ready(function() {
  toggleWebPass();
  $('#enable_webpass').bind('change click focus', function() {
  toggleWebPass();
  });
});