document.insertBefore引发错误 [英] document.insertBefore throws error

问题描述

我有这段代码:

  <textarea id="test" style="width: 400px; height: 100px"></textarea>
  <script>
    var inserting = document.createElement("div");
    document.insertBefore(inserting,document.getElementById("test"));
  </script>

应该在 textarea id = test 之前插入 DIV id = inserting ，但是会出现此错误

Which should insert DIV id=inserting before textarea id=test, but this error occurs

Node was not found" code: "8

我在WinXP上将FireFox 3.6与Firebug一起使用.问题出在哪里?

I use FireFox 3.6 with Firebug on WinXP. Where is the problem?

推荐答案

insertBefore 需要在插入之前的元素的父元素上调用:

insertBefore needs to called on the parent element of the element before which is inserted:

<textarea id="test" style="width: 400px; height: 100px"></textarea>
  <script>
    var inserting = document.createElement("div");
    var insertAt = document.getElementById("test");
    insertAt.parentNode.insertBefore(inserting,insertAt);
  </script>

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