禁止网页使用鼠标右键

   <script>
document.oncontextmenu = function(){
  return false;
}
document.onkeydown = function(){
  if (event.ctrlKey && window.event.keyCode==67){
    return false;
  }
}
document.body.oncopy = function (){
  return false;
}
//不建议连选中文本都不行
document.onselectstart = function(){
  //return false;
}
</script>