问有没有办法防止有人使用javascript从CKEDITOR复制文本？

EN

<script type="text/javascript"> window.onload = preventing;


   function preventing () { 
 /* Disable right click on web page  */
     document.onclick("contextmenu",function(e){
     return false; }); 

/* Disable cut, copy and paste on web page */ 

document.bind('cut copy paste', function (e) {
          e.preventDefault(); }); };

</script>

var element = CKEDITOR.document.getById( 'myElement' );
element.on( 'click', function( ev )
{
    // The DOM event object is passed by the "data" property.
    var domEvent = ev.data;
    // Prevent the click to chave any effect in the element.
    domEvent.stopPropagation();
})