Test case for show attribute of load element
http://www.w3.org/TR/xforms/index-all.html
10.1.8.b show attribute of load element
When you click on the following buttons you should be taken to the XForms specification
on the W3C website. The show attribute should either replace the current page contents with
the new content (show=replace) or open a new presentation and continue form processing in the original
window (show=new).
Load Xforms Spec show not defined
Load Xforms Spec show=new
Load Xforms Spec show=replace