[Solved]-Dynamically changing Highcharts Theme through Jquery code not working-Highcharts

You should merge your theme options with options for the specific chart or use setOptions.

For the first one, example: http://jsfiddle.net/bwefs1ak/1/

var merged_options = $.extend(
    option1, 
    {
        data: {
            table: 'datatable'
        }
    }
);

$('#chartColumnChart').highcharts(merged_options);

For the second one, see any demo with theme. Just click "View visual theme" and the last line is responsible for setting theme.

Note: setting themes will affect only new charts, not existing ones.