title: Get the id of input on keyup
body: <p>I have an input box...</p>
  
  <pre><code>&lt;input type="text" id="search_member" onkeyup="lookup(this.value);"&gt;
  </code></pre>
  
  <p>When I type in the field, it will go to function lookup(). From there I want to get the id of this input. I tried...</p>
  
  <pre><code>var This_id = $(this).attr("id");
  </code></pre>
  
  <p>but this won't work. Any suggestions on how I can get the id?</p>