Loading new data into Data tables

I have a datatable with data loaded via AJAX

Like this:

$(document).ready(function() {
oTable = $('#snapshot').dataTable( {
'sScrollY': 500,
'bPaginate': false,
'bScrollCollapse': true,
'bJQueryUI': true,
'bStateSave': false,
"bFilter": true,
'bSort': true,
"bAutoWidth": false ,
"sAjaxSource": 'live_vision_data.php'
} );
} );

How do I reload the same ajax source file "live_vision_data.php" with one click?