javascript - 如何使用 JavaScript 在 iframe 中引用框架集？

Question

无法弄清楚我做错了什么（除了使用:-P的框架）。

<script type="text/javascript">
    var cols = the_set.cols; //works within frameset.html
    var cols = frames['set_iframe'].the_set.cols; // doesn't work within parent
    var cols = document.getElementById('set_iframe').the_set.cols; // doesn't
    var cols = document.getElementById('set_iframe').getElementById('the_set').cols; // doesn't
</script>

<!--parent.html-->
<iframe id="set_iframe" name="set_iframe" src="frameset.html">

<!--farmeset.html-->
<frameset name="the_set" id="the_set" cols="180,*">
    <frame id="left" name="left">
    <frame id="right" name="left">
</frameset>

Answer 1

尝试：

 var cols = frames['set_iframe'].contentWindow.document.the_set.cols;