흠... dom의 id로 지정한 부분을 간단한 함수로 프린터를 시켜주는 녀석입니다. ^^

github상단에 보면
/*
 * printThis v1.5
 * @desc Printing plug-in for jQuery
 * @author Jason Day
 *
 * Resources (based on) :
 *              jPrintArea: http://plugins.jquery.com/project/jPrintArea
 *              jqPrint: https://github.com/permanenttourist/jquery.jqprint
 *              Ben Nadal: http://www.bennadel.com/blog/1591-Ask-Ben-Print-Part-Of-A-Web-Page-With-jQuery.htm
 *
 * Licensed under the MIT licence:
 *              http://www.opensource.org/licenses/mit-license.php
 *
 * (c) Jason Day 2015
 *
 * Usage:
 *
 *  $("#mySelector").printThis({
 *      debug: false,              * show the iframe for debugging
 *      importCSS: true,            * import page CSS
 *      importStyle: false,        * import style tags
 *      printContainer: true,      * grab outer container as well as the contents of the selector
 *      loadCSS: "path/to/my.css",  * path to additional css file - us an array [] for multiple
 *      pageTitle: "",              * add title to print page
 *      removeInline: false,        * remove all inline styles from print elements
 *      printDelay: 333,            * variable print delay
 *      header: null,              * prefix to html
 *      formValues: true            * preserve input/form values
 *  });
 *
 * Notes:
 *  - the loadCSS will load additional css (with or without @media print) into the iframe, adjusting layout
 */

이렇게 사용법이 ... 적혀있습니다.

네 제목부터 jquery print......