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POonkeyup handler not being called
 

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    <p>I found a post on SO that was actually posted yesterday (I cannot find it now) that says my code below should work, but it does not -- the 'handleRtnKey(e)' function below is never called - why?</p> <pre><code>&lt;input type="text" id="zer" onkeyup="handleRtnKey(e)"/&gt; // my javascript function -- by the way, I will not be using jquery. function handleRtnKey(e) { alert("Just entered handleRtnKey()"); if (!e) { e = window.event; // resolve event instance for IE } alert("Just entered handleRtnKey(), e.keyCode is: " + e.keyCode); alert("Just entered handleRtnKey(), e is: " + e); if (e.keyCode == '13') { alert("handleRtnKey: got the RTN key up event."); return false; } } </code></pre> <p>None of the alerts fire.</p> <p>I found a SO post from yesterday that had this near exact code (without my alerts) that claimed to work fine (sorry I cannot re-find that SO post).</p> <p>I need to use straight javascript (not jquery) to get the key code of the keyup event in my input text box -- that's all I need to do, and if it is the Return key, then I'll take some action, but for now I cannot get the above code to fire that handleRtnKey() function -- why?</p> <p><strong>EDIT</strong></p> <p>Damon introduced me to the keyword 'event' and the above code now works fine -- I simply renamed the argument in the html code from 'e' to 'event' and the javascript handler now works fine -- here is the only modification to the code above I had to make:</p> <pre><code> // OLD &lt;input type="text" id="zer" onkeyup="handleRtnKey(e)"/&gt; // NEW &lt;input type="text" id="zer" onkeyup="handleRtnKey(event)"/&gt; </code></pre> <p>NOTE: the javascript function handleRtnKey(e) is <em>unchanged</em>, there was no reason for my to change that function's signature, it looks like below and works fine now:</p> <pre><code>function handleRtnKey(e) { alert("Just entered handleRtnKey()"); if (!e) { e = window.event; // resolve event instance for IE } alert("Just entered handleRtnKey(), e.keyCode is: " + e.keyCode); alert("Just entered handleRtnKey(), e is: " + e); if (e.keyCode == '13') { alert("handleRtnKey: got the RTN key up event."); return false; } } THANKS DAMON. </code></pre>
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    1. COLook at the console `Uncaught ReferenceError: e is not defined`
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    2. COYep I know the event is undefined -- but I have seen several posts on SO that describe passing an 'event' argument from the html's onkeyup to the function -- such as the 3rd answer and the onkeypress handler here in this SO post, specifically this line of code: onkeypress="searchKeyPress(event); -- http://stackoverflow.com/questions/155188/trigger-a-button-click-with-javascript-on-the-enter-key-in-a-text-box
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    3. CORead this: http://www.quirksmode.org/js/introevents.html ANd in that post they are passing `event` which is not `e`.
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