Javascript Get Child Element by Name

问题

I'm passing a var el into a function. el contains previously grabbed element (using getElementById) and when I console.log el in the function I get the following:

The problem comes in when I try to grab an element inside of the el using:

el.getElementsByName('fname');

I get the error:

Uncaught TypeError: Object #<HTMLDivElement> has no method 'getElementsByName'

回答1:

The getElementsByName() API is at the document object level. It's not an HTMLElement method.

You could use querySelectorAll() instead:

var fnames = el.querySelectorAll('[name=fname]');

It's not supported in older browsers however.

来源：https://stackoverflow.com/questions/14842951/javascript-get-child-element-by-name