本着尊重版权的目的，别人拷贝你的文章内容时应该附带有授权 ，但很多人没有这方面的意识，所以，在js中稍作处理，别人复制你的文章时，就会自动添加上版权信息

util.addHandler(document.querySelector('body'),'copy',function(){

    if (typeof window.getSelection == "undefined") return; //IE8 or earlier...

   

    var body_element = document.getElementsByTagName('body')[0];

    var selection = window.getSelection();

    

    //if the selection is short let's not annoy our users

    if (("" + selection).length < 30) return;



    //create a div outside of the visible area

    //and fill it with the selected text

    var newdiv = document.createElement('div');

    newdiv.style.position = 'absolute';

    newdiv.style.left = '-99999px';

    body_element.appendChild(newdiv);

    newdiv.appendChild(selection.getRangeAt(0).cloneContents());

    

    //we need a <pre> tag workaround

    //otherwise the text inside "pre" loses all the line breaks!

    if (selection.getRangeAt(0).commonAncestorContainer.nodeName == "PRE") {

        newdiv.innerHTML = "<pre>" + newdiv.innerHTML + "</pre>";

    }

    

    newdiv.innerHTML += "著作权归作者所有。<br />商业转载请联系作者获得授权,非商业转载请注明出处。<br />原文: <a href='"

    + document.location.href + "'>"

    + document.location.href + "</a> &copy; <a href='//www.lcddjm.com'>www.lcddjm.com</a>";

            

    selection.selectAllChildren(newdiv);

    window.setTimeout(function () { body_element.removeChild(newdiv); }, 200);

})