title: change onclick even to autocall
body: <p>I have radio button input onclick named 
      onclick="shippingMethodStep.save()" 
  when someone clicked it it will add my shipping cost to my grand total billing in pagecheckout. </p>
  
  <p>I want function "shippingmethodstep.save()" automaticly called without click the radio</p>
  
  <p>here is the radio button code :</p>
  
  <pre><code>&lt;input name="shipping_method" type="radio" value="&lt;?php echo $_rate-&gt;getCode() ?&gt;" id="s_method_&lt;?php echo $_rate-&gt;getCode() ?&gt;"&lt;?php if($_rate-&gt;getCode()===$this-&gt;getAddressShippingMethod()) echo ' checked="checked"' ?&gt; onclick="shippingMethodStep.save()"/&gt;
  </code></pre>
  
  <p>I already search and try to call it automaticly by change onclick to onload or add shippingMethodStep.save() but it doesn't work. I think I put the script wrong because I am very newbie to javascript.</p>
  
  <p>can you please give advice for this.</p>
  
  <p>thanks</p>