I have a page full of spans. Each span has 3 radio buttons in it. I have the following click 

event wired in a script tag and it works fine in compatibility mode of a browser but not IE9 or

nor Chrome 22.0.1229.94.  How can I get the span ID ?  I get NaN or undefined.

 var _ladderId = $(this).closest('span').attr('id');             alert(_ladderId);

I alos tried to use a hidden value with this script:

 
var _ladderId3 = $(this).parent().find('.MyLadderId').val();
alert(_ladderId3);

HTML:

 
<span id=103>
 
<tr> 
<td> 
<input type="hidden" name="MyLadderId" value=103 id=103 />
 103
 
</td>
 
<td> 
</td> 
<td>
 
<input class="create" type="radio" name="Disposition" value="P"/> Pass <br /> 
<input class="create" type="radio" name="Disposition" value="M"/> In Maintenance For Repairs <br /> 
<input class="create" type="radio" name="Disposition" value="X"/> Removed From Service Permanently <br />  
</td>
 
<td> 
 
<a href="/ladders/ladderinspection/GetHistory/103">Get History</a> 
 
</td> 
</tr>
</span>