Preamble

Events which are assigned to the table elements are retained by DataTables such that they will still work as you would expect, even after changing the sort order etc. (no need to reapply the event handlers). You can do this at any time, although if you apply the handlers after the table has been initialised there is an extra set. Rather then queriing the DOM to get all rows (since they aren't there) you need to use the fnGetNodes() API function. This is shown in this example.

Live example

Initialisation code

$(document).ready(function() {
	/*
	 * First step is to create title attributes for the rows in the table
	 * This isn't needed if the required 'title' attribute is already set in the HTML in the
	 * DOM 
	 */
	$('#example tbody tr').each( function() {
		var sTitle;
		var nTds = $('td', this);
		var sBrowser = $(nTds[1]).text();
		var sGrade = $(nTds[4]).text();
		
		if ( sGrade == "A" )
			sTitle =  sBrowser+' will provide a first class (A) level of CSS support.';
		else if ( sGrade == "C" )
			sTitle = sBrowser+' will provide a core (C) level of CSS support.';
		else if ( sGrade == "X" )
			sTitle = sBrowser+' does not provide CSS support or has a broken implementation. Block CSS.';
		else
			sTitle = sBrowser+' will provide an undefined level of CSS support.';
		
		this.setAttribute( 'title', sTitle );
	} );
	
	/* Init DataTables */
	var oTable = $('#example').dataTable();
	
	/* Apply the tooltips */
	$( oTable.fnGetNodes() ).tooltip( {
		"delay": 0,
		"track": true,
		"fade": 250
	} );
} );

Other examples