<!--parser:xtscript-->
get copy
if $copy == 1
var $textarea = textarea
var $text = Text
var $val = 0        
endif
<!--/parser:xtscript-->

<{_$$textarea|pre}>
This is the content
to be displayed
</{_$$textarea|pre}>

<!-- The switch button -->
<form action="<xt:url>" method="post">
  <input type="hidden" name="copy" value="{_$$val|1}" />
  <input type="submit" value="{_$$text|Textarea}" />
</form>