Sometimes a URL needs to force a post to the server. However, there are times when this URL may not navigate you away from the page (such as when presenting the user with a download dialog).
submitForm currently locks all submits from taking place so that a form cannot be submitted more than once.
However, for links that do not navigate, but need to post, this means that they will only fire once.
Liferay.Util.forcePost should take care of this by clearing the submit lock after every submit.