r">(</span><span class="String">"argument is: %s"</span> <span class="Operator">%</span> <span class="Operator">(</span><span class="ID">arg1</span><span class="Operator">)</span><span class="Operator">)</span><span class="Text"></span></span>
</pre></div><span class="anchor" id="line-238"></span><p class="line874">The  defaultunit of px is used if the user does not enter a unit. He has to enter valid units of px or %.  <span class="anchor" id="line-239"></span><span class="anchor" id="line-240"></span><p c