title: Cross-Page Posting Without PostBackUrl
body: <p>Is there a way to do cross-page posting without setting the PostBackUrl attribute or PostBackOptions to a control? I need a way to be able to dynamically change the action url on the client side.</p>
  
  <p>Currently I am using form.action to post to another page, but this fails when I set EnableViewStateMac = "true". Microsoft's recent security updates requires this EnableViewStateMac setting: <a href="http://blogs.msdn.com/b/webdev/archive/2014/09/09/farewell-enableviewstatemac.aspx" rel="nofollow">http://blogs.msdn.com/b/webdev/archive/2014/09/09/farewell-enableviewstatemac.aspx</a></p>