Noop Task
The <noop> task says that nothing should be done (noop stands for "no operation"). This tag is used to override deck-level elements.
The <do> tag can be used to activate a task when the user clicks on a word/phrase on the screen.
The example below uses a <do> tag to add a "Back" link to the card. When the user clicks on the "Back" link, he or she should be taken back to the previous card. But the <noop> tag prevents this operation; when the user clicks on the "Back" link nothing will happen:
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card>
<p>
<do name="back" type="prev" label="Back">
<noop/>
</do>
</p>
</card>
</wml>