get attribute value with javascript in select list
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/10369241/use-created-attribute-with-javascript-in-select-list">Use created attribute with javascript in select list</a>  </p>
</blockquote>



<p>im trying to access an attribute that i created in a select list.</p>

<pre><code>&lt;script language="JavaScript"&gt;
function updateUrl()
    {
        var newUrl = document.getElementById('test').getAttribute('car');
        alert(newUrl);
    }
&lt;/script&gt;

&lt;select name= "test" id= "test" onChange= "updateUrl()"&gt;
     &lt;option value="1" selected="selected" car="red"&gt;1&lt;/option&gt; 
     &lt;option value="2" car="blue" &gt;2&lt;/option&gt; 
     &lt;option value="3" car="white" &gt;3&lt;/option&gt; 
     &lt;option value="4" car="black" &gt;4&lt;/option&gt;    
&lt;/select&gt;
</code></pre>

<p>it keep giving me null. how do i get the value from attribute car?</p>
