how to use requiredif

[georgehill]

Hi all,

I hava question about the use of required in the validation.xml file.My example is :
     <field property="conPassword" depends="requiredif">
       <arg0 key="prompt.confirm.password"/>
       <var>
         <var-name>test</var-name>
         <var-value>((newPassword != null)</var-value>
       </var>
     </field>
Is it right? If it's wrong, please give me a right example.
Thanks a lot. :)