observe other field blur event
<p>i want to observe other field blur event.
Suppose i have</p>

<pre><code>&lt;input type="text" name="age" id="age"&gt;
</code></pre>

<p>whose value is observe by other field like</p>

<pre><code>&lt;select name = "married" id = "married" someEvent = "function(par1, par2);"&gt;
   &lt;option value = "Yes"&gt;Yes&lt;/option&gt;
   &lt;option value ="No"&gt;No&lt;/option&gt;
&lt;/select&gt;
</code></pre>

<p>fuction observes age field (i.e. blur event of age field).</p>

<p>Here question is that what event call that fuction which observes the blur event of age.Please help.
Above is just example i know i can do by using id's of field but this is not the same case every time.My id's, form elements and condition always change.</p>

<p>For reference my previous question is there - <a href="http://stackoverflow.com/questions/11503444/show-or-hide-form-element">Show or hide form element</a></p>
