Firefox无法找到iframe-Firefoxnotabletofindiframe

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The window.frames[] array is indexed by the [i]frame's name attribute (aka frame target). id can't be relied upon to also work — although it may in IE <8, which often thinks names and ids are the same thing.

window.frames []数组由[i]帧的名称属性(也称为帧目标)索引。不能依赖id也可以工作 - 虽然它可能在IE <8中,它通常认为名称和ID是相同的东西。

If you want to access a frame's content via ID, use the DOM Level 2 HTML contentDocument property instead of the old-school (“DOM Level 0”) frames array:

如果要通过ID访问框架的内容,请使用DOM Level 2 HTML contentDocument属性而不是old-school(“DOM Level 0”)框架数组:

document.getElementById('additionalTxt_f').contentDocument.body.innerHTML

...but then, for compatibility with IE <8, you also have to add some fallback cruft, since it doesn't support contentDocument:

...但是,为了兼容IE <8,你还必须添加一些后备,因为它不支持contentDocument:

var f= document.getElementById('additionalTxt_f');
var d= f.contentDocument? f.contentDocument : f.contentWindow.document;
d.body.innerHTML

So it's up to you which method you think is less ugly: the extra script work, or just using the name attribute.

因此,您认为哪种方法不那么难看:额外的脚本工作,或者仅使用name属性。

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if you have only 1 iframe you can also find it with window.frames[1] or document.getElementsByTagName('iframe')[0]

如果您只有1个iframe,您也可以使用window.frames [1]或document.getElementsByTagName('iframe')[0]找到它

(In the first option, the parent window is #0)

(在第一个选项中,父窗口为#0)