<script type="text/javascript">
$(document).ready(function(){
  var $ctrl = false;
  var $key = 17, $c = 67, $v = 86, $alt = 18;
   $(document).bind("contextmenu",function(e){
    return false;
  });
  $(document).keydown(function(e) {
    if (e.keyCode == $key) { $ctrl = true; }
  }).keyup(function(e) {
    if (e.keyCode == $key) { $ctrl = false; }
  });
  $(document).keydown(function(e) {
    if (e.keyCode == $alt) { $ctrl = false; }
  });
  $(document).keydown(function(e) {
    if ($ctrl && (e.keyCode == $v || e.keyCode == $c)) {
      return false;
    }
  });
});
</script>