AJAX 초보 참고 사이트http://kaeng-star.tistory.com 자바스크립트 그래프, 차트 그리기 참고 사이트http://www.highcharts.com/demo/column-stackedhttp://api.highcharts.com/highcharts#Chart.exportChart()http://jsfiddle.net/gh/get/jquery/1.9.1/highslide-software/highcharts.com/tree/master/samples/highcharts/demo/combo/http://jsfiddle.net/gh/get/jquery/1.9.1/highslide-software/highcharts.com/tree/master/samples/highcharts/demo/co..