Quick quote

This tutorial will allow you to perform a quick quote of a word or phrase that you have highlighted previously, by adding a new button or using the current quote button.

Result :

Installing

To install this we must go to Administration Panel > Modules > JavaScript codes management and create a new script.

Title : Your choice
Placement : In all the pages
Code:   Select Content

Code:

$(function(){
  var forum_version = 1,
  new_button = false,
  quote_image = 'http://i39.servimg.com/u/f39/18/21/60/73/quick10.png';

  if (forum_version == 0) n = [".postbody div",".name strong a"];
  if (forum_version == 1) n = [".postbody .content div",".postprofile dl dt strong a"];
  if (forum_version == 2) n = [".entry-content div",".username a"];
  if (forum_version == 3) n = [".post-entry div",".postprofile-details dt a + br + a"];
  if
 (new_button == true) { q = ".quickquote";
$(forum_version==1?"li:has(.i_icon_quote)":"a:has(.i_icon_quote)").after($('<li
 style="display:inline-block;list-style:none;"><a
href="#quick_reply"><img src="'+quote_image+'" class="quickquote"
alt="Quick quote" title="Quick quote" /></a></li>')) }
  if
 (new_button == false) { q = "a:has(.i_icon_quote)";
$("a:has(.i_icon_quote)").attr("href", "#quick_reply");
$(".i_icon_quote").attr("title", "Reply with quote") }
  
  $(document).on('mouseup',n[0],function(e){
    qtext = $(this).parents(".post");
    if (window.getSelection) theSelection = window.getSelection().toString();
    else if (document.getSelection) theSelection = document.getSelection();
    else if (document.selection) theSelection = document.selection.createRange().text;
  });  
  
  $(q).click(function () {
    if (typeof qtext == 'undefined') return;
    uname = qtext.find(n[1]).text();
  
  $("div.sceditor-toolbar +
iframe").contents().find("body").append('<blockquote><cite>'
 + uname + '</cite>' + theSelection + '</blockquote> <br
/>');
    $('.sceditor-container textarea')[0].value += '[quote="' + uname + '"]' + theSelection + '[/quote]'
  });
  var n,q;
});

Modifications
Below are some variables you can modify in the script.

To ensure that this tutorial works for you, you must change the value of forum_version to the version of your forum :
0 = phpbb2
1 = phpbb3
2 = punbb
3 = invision

To keep the regular quote button and add a new button for the quick quote you must change the value of new_button :
true = create a new button
false = use the current quote button

Result :

To change the quick quote image, simply replace https://i.servimg.com/u/f39/18/21/60/73/quick10.png by the URL of your image. The current image can be found at the top of the script in the quote_image variable.