jQuery find() works in IE, but not Chrome or Firefox

I'm s开发者_Go百科etting up custom textExtraction for the jQuery plugin tablesorter control (which is probably irrelevant) and the sort works in IE, but not Chrome or Firefox. Here's a snippet of the JavaScript code:

    var searchResultsTables = $("table.FilterClass");

    searchResultsTables.tablesorter({
        widgets: ['zebra'],
        widgetZebra: { css: ["Odd", "Even"] },
        headers:
        {
            3: { textExtraction: function (node)
            {
                return $(node).find("img").length;
            }
            },
            4: { sorter: false }
        }
    }
    );

Node is the <td> (I believe). Some cells have an image in them and others don't. So, basically, this column should sort based on 0/1. All the other columns sort just fine (with the exception of the 5th column, which, as you can see, is set not to be sortable).

Here is a bit of the html upon which the sort is acting (2 rows):

<table class="SearchResultsTable FilterClass tablesorter">
    <tr class="Odd">
        <td class="SearchResultsCell RightBrownBorder NameCell">
        <a href="/Candidate/2">Bill Clinton</a></td>
        <td class="SearchResultsCell RightBrownBorder PartyCell">Democrat</td>
        <td class="SearchResultsCell RightBrownBorder DistrictCell"></td>
        <td class="SearchResultsCell RightBrownBorder IncumbentCell">
            <img src="/Images/green_check_mark.gif" />
        </td>
        <td class="SearchResultsCell PoliticalSpectrumIndexCell"></td>
    </tr>
    <tr class="Even">
        <td class="SearchResultsCell RightBrownBorder NameCell">
        <a href="/Candidate/13">Newt Gingrich</a></td>
        <td class="SearchResultsCell RightBrownBorder PartyCell" title="Party for Socialism and Liberation">Party for...</td>
        <td class="SearchResultsCell RightBrownBorder DistrictCell"></td>
        <td class="SearchResultsCell RightBrownBorder IncumbentCell"></td>
        <td class="SearchResultsCell PoliticalSpectrumIndexCell"></td>
    </tr>

Any ideas why this wouldn't work in Chrome or Firefox?

I don't think you can put a textextraction function within the header option.

When I coded an example like yours, I had this, and it worked:

 var searchResultsTables = $("table.FilterClass");        

 searchResultsTables.tablesorter({          
    widgets: ['zebra'],          
    widgetZebra: { css: ["Odd", "Even"] }, 
    textExtraction: function (node)              
        {    
            if (node.cellIndex == 3)
            {
                return $(node).find("img").length;   
            }
            else
            {
                return node.innerHTML
            }           
        }   
    headers:          
    {                           
        4: { sorter: false }   
    }     
} );