javascript - tablesorter with custom sorter's rules -

i use table connected tablesorter library (http://tablesorter.com/docs).

$('#mytable').tablesorter({     dateformat:     'yyyy-mm-dd',      widthfixed:     false,     widgets:        ['zebra'],                   }); 

all columns sorted correctly, except containing html code (such columns not sorted @ all).

<tr>     <td>text - sorting correct</td>     <td>text <span>new text</span> - srting incorrect</td> </tr> 

how fix error?

i thought write means of tablesorter (if any) sorting function, contents of tabith cell perceived text, without tags