网页中禁止右键，禁止f12，禁止ctrl+s等

<script>
    document.onkeydown = function(event) {
      var e = event || window.event || arguments.callee.caller.arguments[0];
      if (e.keyCode === 67 || e.keyCode === 86 || e.keyCode === 13) return true;
      if ((e.keyCode === 123) || (e.ctrlKey) || (e.ctrlKey) && (e.keyCode === 85)) {
        return false
      }
    };
    // 禁止右键
    document.oncontextmenu = function(event) {
      return false
    };
  </script>

js根据name属性动态删除div

html部分

<a href="JAVAscript:del('reducedLine','mlt24',0)">删除</a>
<div id="reducedLine">
    <div name="mlt24">1</div>
    <div name="mlt24">2</div>
    <div name="mlt24">3</div>
    <div name="mlt24">4</div>
</div>

js部分

function del(a,b,c){
    var removeObj = document.getElementById(a).children[b][c];
        removeObj.parentNode.removeChild(removeObj);
}