How to Remove extra space of a Jquery datatable?

Hi,
I'm using Jquery datatable and the default length(displaying no of rows) is 10.But in my Datatablei have changed it to 5 only by using below code.
var feedbackDetailsDataTable = $('#tblFeedbackList').dataTable({
'bPaginate': false,
'bLengthChange': false,
'bInfo': false,
'bProcessing': false,
'bAutoWidth': false,
'bServerSide': false,
'bFilter': false,
'bJQueryUI': true,
'sPaginationType': "full_numbers",
'iDisplayLength': 5,
'sAjaxSource': webservice,
'fnServerData': function (sSource, aoData, fnCallback) { }
$.ajax({
"type": "POST",
"dataType": 'json',
"contentType": "application/json; charset=utf-8",
"url": sSource,
"data": srch,
"success": fnCallback
});
},
aoColumns: [
/* Day */{'sSortDataType': 'dom-text', 'sType': 'date', 'sWidth': '10%' },
/* Activity Date */{'sSortDataType': 'dom-text', 'sType': 'date', 'sWidth': '10%' },
/* Hours */{'bSortable': false, 'sWidth': '10%', 'sClass': 'alignRight' },
/* Balance */{'bSortable': false, 'sWidth': '10%', 'sClass': 'alignRight' }
]
});


This code is working fine but i am experiencing some extra space below the table(records) which is not looks good.Can anyone tell me how to remove this space.

Thanks in advance.
Saroj