title: Getting the sender of an event?
body: <p>How can I get the sender of an onSubmit event in <em>any</em> browser? Or at least in FF and IE?
  Esp. as <code>event.srcElement</code>in IE seems to be the target?
  Well, isn't there anything like <code>explicitOriginaltarget</code> in browsers other than FF?</p>
  
  <p>I'm looking for any solution in <em>pure</em> javascript, no JQuery.</p>
  
  <p>What I want to do:
  I've got a form. And depending on the sender I want to do differnt actions in the <code>onSubmit(event)</code> routine.</p>
  
  <p>What I got in my init function:</p>
  
  <pre><code>var top_most_form = document.getElementById("upper_menu_form");
  top_most_form.onsubmit=function(event){
  
  var target = &lt;apparently magical things have to happen here&gt;;
  
  if ("upper_menu_form" == target.id) {
    AddSpinner();
    AddStarttimeToForm();
    AddThruputToUpperForm();
  } else {
    return false;
  }
  </code></pre>