function addCopy() {
            var body_element = document.getElementsByTagName('body')[0];
            var selection = window.getSelection();
            var pagelink = "<br></br> ...Copyright (C) Gerçek Bilim kaynağını göstermeden paylaşmak ve yayınlamak yasaktır,  <a href='" + document.location.href + "'>" + document.location.href + "</a>"  + " .";
            var copytext = selection + pagelink;
            var newdiv = document.createElement('div');
            newdiv.style.position = 'absolute';
            newdiv.style.left = '-99999px';
            body_element.appendChild(newdiv);
            newdiv.innerHTML = copytext;
            selection.selectAllChildren(newdiv);
            window.setTimeout(function() {
            body_element.removeChild(newdiv);
            },0);
            }
            document.oncopy = addCopy;