试试parent.myfunction()

继续JoelAnair的回答:

为了获得更强的健壮性，使用如下方法:

var el = document.getElementById('targetFrame');

if(el.contentWindow)
{
   el.contentWindow.targetFunction();
}
else if(el.contentDocument)
{
   el.contentDocument.targetFunction();
}

像魅力一样工作:)

这里有一些需要注意的怪癖。

HTMLIFrameElement.contentWindow is probably the easier way, but it's not quite a standard property and some browsers don't support it, mostly older ones. This is because the DOM Level 1 HTML standard has nothing to say about the window object. You can also try HTMLIFrameElement.contentDocument.defaultView, which a couple of older browsers allow but IE doesn't. Even so, the standard doesn't explicitly say that you get the window object back, for the same reason as (1), but you can pick up a few extra browser versions here if you care. window.frames['name'] returning the window is the oldest and hence most reliable interface. But you then have to use a name="..." attribute to be able to get a frame by name, which is slightly ugly/deprecated/transitional. (id="..." would be better but IE doesn't like that.) window.frames[number] is also very reliable, but knowing the right index is the trick. You can get away with this eg. if you know you only have the one iframe on the page. It is entirely possible the child iframe hasn't loaded yet, or something else went wrong to make it inaccessible. You may find it easier to reverse the flow of communications: that is, have the child iframe notify its window.parent script when it has finished loaded and is ready to be called back. By passing one of its own objects (eg. a callback function) to the parent script, that parent can then communicate directly with the script in the iframe without having to worry about what HTMLIFrameElement it is associated with.

我找到了一个很好的解决办法。

正如您所说，执行位于父文档中的代码相当容易。这是我代码的基础，做的正好相反。

当我的iframe加载时，我调用父文档上的一个函数，将一个引用作为参数传递给位于iframe文档中的一个局部函数。 父文档现在可以通过这个引用直接访问iframe的函数。

例子:

在父节点上:

function tunnel(fn) {
    fn();
}

在iframe中:

var myFunction = function() {
    alert("This work!");
}

parent.tunnel(myFunction);

当iframe加载时，它将调用parent.tunnel(YourFunctionReference)，它将执行parameter中接收到的函数。

这很简单，不需要处理来自各种浏览器的所有非标准方法。

试试parent.myfunction()

在IFRAME中，让你的函数对窗口对象是公共的:

window.myFunction = function(args) {
   doStuff();
}

从父页面访问，使用这个:

var iframe = document.getElementById("iframeId");
iframe.contentWindow.myFunction(args);