https://emomsathome.com/blog/wp_content/plugins/sociable/description_selection.js

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6/*
7     FILE ARCHIVED ON 0:29:55 Apr 20, 2007 AND RETRIEVED FROM THE
8     INTERNET ARCHIVE ON 20:43:07 Jun 16, 2015.
9     JAVASCRIPT APPENDED BY WAYBACK MACHINE, COPYRIGHT INTERNET ARCHIVE.
10
11     ALL OTHER CONTENT MAY ALSO BE PROTECTED BY COPYRIGHT (17 U.S.C.
12     SECTION 108(a)(3)).
13*/
14// /web/20070420002955/http://www.quirksmode.org/js/selected.html
15function sociable_get_selection() {
16    if (window.getSelection)
17        return "" + window.getSelection();
18    else if (document.getSelection)
19        return "" + document.getSelection();
20    else if (document.selection)
21        return "" + document.selection.createRange().text;
22}
23
24function sociable_description_link(link, attribute) {
25    if (typeof(link.original_link) == "undefined")
26        link.original_link = link.href;
27    link.href = link.original_link + "&" + attribute + "=" + sociable_get_selection();
28    return false;
29}