confluence/spaces/createspace.vm, lines 97-106: <script type="text/javascript"> function initFormValidation() { if($("key")) var spaceKeyValidation = new InputValidation("key", "/ajax/spaceavailable.action"); } Event.observe(window, 'load', initFormValidation, false); </script> The /ajax/ URL needs a context path before it. This can cause problems in some browsers.