Javascript print_str (from http://www.tiny-threads.com/blog/2014/07/02/javascript-print-string/)

gistfile1.js

/*
* Javascript String Printer
* Written by Steve Koehler
* www.tiny-threads.com
*/

function print_str(str){
    var print_name = ("printer-" + (new Date()).getTime()); //random printer name
    var elemFrame=document.createElement('iframe'); //the printer iframe
    var printer; //the window instance of the iframe
    
    //set the iframe attributes
    elemFrame.style.cssText = 'position:absolute;left:-9999px;width:1px;height:1px;';
    elemFrame.id=print_name;
    elemFrame.name=print_name;
    
    //add the iframe to the page
    document.body.appendChild(elemFrame);

    //grab the iframe window object, insert the string, and print
    printer = elemFrame.contentWindow;
    printer.document.open();
    printer.document.write(str);
    printer.document.close();
    printer.focus();
    printer.print();

    //remove the iframe after a minute so we don't overload
    setTimeout(function(){elemFrame.remove();},(60 * 1000));
}