You need to customize with tablesorter options. Here is example http://jsfiddle.net/dhana36/BKgue/184/
$('.tablesorter').tablesorter({
// *** Appearance ***
// fix the column widths
widthFixed : true,
// include zebra and any other widgets, options:
// 'uitheme', 'filter', 'stickyHeaders' & 'resizable'
// the 'columns' widget will require custom css for the
// primary, secondary and tertiary columns
widgets : [ 'uitheme', 'zebra' ],
// other options: "ddmmyyyy" & "yyyymmdd"
dateFormat : "mmddyyyy",
// *** Functionality ***
// starting sort direction "asc" or "desc"
sortInitialOrder : "asc",
// These are detected by default,
// but you can change or disable them
headers : {
// set "sorter : false" (no quotes) to disable the column
0: { sorter: "text" },
1: { sorter: "digit" },
2: { sorter: "text" },
3: { sorter: "url" }
},
// extract text from the table - this is how is
// it done by default
textExtraction : {
0: function(node) { return $(node).text(); },
1: function(node) { return $(node).text(); }
},
// forces the user to have this/these column(s) sorted first
sortForce : null,
// initial sort order of the columns
// [[columnIndex, sortDirection], ... ]
sortList : [[3,0]],
// default sort that is added to the end of the users sort
// selection.
sortAppend : null,
// Use built-in javascript sort - may be faster, but does not
// sort alphanumerically
sortLocaleCompare : false,
// Setting this option to true will allow you to click on the
// table header a third time to reset the sort direction.
sortReset: false,
// Setting this option to true will start the sort with the
// sortInitialOrder when clicking on a previously unsorted column.
sortRestart: false,
// The key used to select more than one column for multi-column
// sorting.
sortMultiSortKey : "shiftKey",
// *** Customize header ***
onRenderHeader : function() {
// the span wrapper is added by default
$(this).find('span').addClass('headerSpan');
},
// jQuery selectors used to find the header cells.
selectorHeaders : 'thead th',
// *** css classes to use ***
cssAsc : "headerSortUp",
cssChildRow : "expand-child",
cssDesc : "headerSortDown",
cssHeader : "header",
tableClass : 'tablesorter',
// *** widget css class settings ***
// column classes applied, and defined in the skin
widgetColumns : { css: ["primary", "secondary", "tertiary"] },
// find these jQuery UI class names by hovering over the
// Framework icons on this page:
// http://jqueryui.com/themeroller/
widgetUitheme : { css: [
"ui-icon-arrowthick-2-n-s", // Unsorted icon
"ui-icon-arrowthick-1-s", // Sort up (down arrow)
"ui-icon-arrowthick-1-n" // Sort down (up arrow)
]
},
// pick rows colors to match ui theme
widgetZebra: { css: ["ui-widget-content", "ui-state-default"] },
// *** prevent text selection in header ***
cancelSelection : true,
// *** send messages to console ***
debug : false
});