;(function (element) {
    var preventSelection = false;
    
    function addHandler (element, event, handler) {
      if (element.attachEvent)
        element.attachEvent ('on' + event, handler);
      else if (element.addEventListener)
        element.addEventListener (event, handler, false);
    }
    
    function removeSelection () {
      if (window.getSelection)
        window.getSelection ().removeAllRanges ();
      else if (document.selection && document.selection.clear)
        document.selection.clear ();
    }
    
    function killCtrlA (event) {
      var event = event || window.event;
      var sender = event.target || event.srcElement;
      if (sender.tagName.match (/INPUT|TEXTAREA/i))
        return;
      var key = event.keyCode || event.which;
      if (event.ctrlKey && key == 'A'.charCodeAt (0)) {
        removeSelection();
        if (event.preventDefault)
          event.preventDefault ();
        else
          event.returnValue = false;
      }
    }
    
    function killCtrlC (event) {
      var event = event || window.event;
      var sender = event.target || event.srcElement;
      if (sender.tagName.match (/INPUT|TEXTAREA/i))
        return;
      var key = event.keyCode || event.which;
      if (event.ctrlKey && key == 'C'.charCodeAt (0)) {
        removeSelection ();
        if (event.preventDefault)
          event.preventDefault();
        else
          event.returnValue = false;
      }
    }

    addHandler (element, 'mousemove', function () {
      if (preventSelection)
        removeSelection ();
    });

    addHandler (element, 'mousedown', function (event) {
      var event = event || window.event;
      var sender = event.target || event.srcElement;
      preventSelection = !sender.tagName.match (/INPUT|TEXTAREA/i);
    });

    addHandler (element, 'mouseup', function () {
      if (preventSelection)
        removeSelection ();
      preventSelection = false;
    });

    addHandler (element, 'keydown', killCtrlA);
    addHandler (element, 'keyup', killCtrlA);
    addHandler (element, 'keydown', killCtrlC);
    addHandler (element, 'keyup', killCtrlC);
  }) (document);