how to set imge alt attribute by its div id by using javascript

Question

I am trying to set image alt attribute via JavaScript.The problem is that image do not have id it self, All I have of its div Id.

<div id="logo">
<a href="http://yourwebsite.com">
<img alt="nkki" src="http://crankit.com.au/~thstarse/wp-content/themes/bigbangwp/image/logo.png">
</img>
</a>

What I am trying, however I am having no luck. Can anyone give me a hand with my code?

$(this).children('img').setAttribute('alt', 'new alt');

The Answer of this question is

document.querySelector("#logo img").setAttribute('alt', 'new alt');

Answer 1

Try this

$('#logo').find('img').attr('alt', 'new alt');

Working Demo

Answer 2

您也可以使用纯JavaScript来实现。

document.querySelector("#logo img").setAttribute('alt', 'new alt');

Answer 3

你可以试试这个演示

$("#logo img").attr("alt","alertnate image.jpg");