document.getElementById（“selAge”）与document.myForms.selAge [英] document.getElementById(“selAge”) Vs document.myForms.selAge

问题描述

What is difference between

document.getElementById("selAge") 
document.myForms.selAge

何时使用哪个？

推荐答案

document.getElementById（）是获取元素引用的推荐方式。如果您决定更改表单名称或ID，则使用起来更方便，也不需要进行任何更改。
然而，当它遍历整个DOM树时，它通常比引用对象的document.forms表示法慢，所以在做很多这样的查找时要考虑到这一点。

document.getElementById() is the recommended way to get reference of elements. It's easier to use and also would not require any changes if you decide to change the Form name or Id. However, as it traverses the entire DOM tree, it is usually slower than the document.forms notation of referencing objects, so take this into account when doing a lot of such look-ups.

document.forms也很难使用，因为您需要知道从文档元素开始的对象的整个路径。

document.forms is also harder to use, as you need you to know the entire path to the object beginning from the document element.

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