jQuery.fn.addtocopy = function(usercopytxt) {
    var options = {htmlcopytxt: '<br>More: <a href="'+window.location.href+'">'+window.location.href+'</a><br>', minlen: 25, addcopyfirst: false}
    $.extend(options, usercopytxt);
    var copy_sp = document.createElement('span');
    copy_sp.id = 'ctrlcopy';
    copy_sp.innerHTML = options.htmlcopytxt;
    return this.each(function(){
        $(this).mousedown(function(){$('#ctrlcopy').remove();});
        $(this).mouseup(function(){
            if(window.getSelection){    //good times
                var slcted=window.getSelection();
                var seltxt=slcted.toString();
                if(!seltxt||seltxt.length<options.minlen) return;
                var nslct = slcted.getRangeAt(0);
                seltxt = nslct.cloneRange();
                seltxt.collapse(options.addcopyfirst);
                seltxt.insertNode(copy_sp);
                if (!options.addcopyfirst) nslct.setEndAfter(copy_sp);
                slcted.removeAllRanges();
                slcted.addRange(nslct);
            } else if(document.selection){    //bad times
                var slcted = document.selection;
                var nslct=slcted.createRange();
                var seltxt=nslct.text;
                if (!seltxt||seltxt.length<options.minlen) return;
                seltxt=nslct.duplicate();
                seltxt.collapse(options.addcopyfirst);
                seltxt.pasteHTML(copy_sp.outerHTML);
                if (!options.addcopyfirst) {nslct.setEndPoint("EndToEnd",seltxt); nslct.select();}
            }
        });
  });
}