title: how to add an on keyup function with jquery
body: <p>I need to add an onkeyup function to an input field that I cannot edit. The field currently looks like this. </p>
  
  <pre><code>  &lt;input id="billing_addr_zipname" type="text" maxlength="50" value="" name="billing_addr_zipname"&gt;
  </code></pre>
  
  <p>I need to add this ...</p>
  
  <pre><code>onkeyup="return AddressCountEdit(this,'spanEditAddress', event)"
  </code></pre>
  
  <p>... to the id using jquery. </p>
  
  <p>Anyone know how to do that?</p>