append string to image src using js

Question

I\'ve got a page where there is

I want it so that upon loading of the page, the string \"?

Answer 1

window.addEventListener('load', function(){
    /* assuming only one img element */
    var image = document.getElementsByTagName('img')[0];

    image.src += '?Action=thumbnail';
}, false);

Note, changing the source of the image will "re-fetch" the image from the server — even if the image is the same. This will be better done on the server-side.

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Update after comment:

window.addEventListener('load', function(){
    /* assuming only one div with class "divclassname" and img is first child */
    var image = document.getElementsByClassName('divclassname')[0].firstChild;

    image.src += '?Action=thumbnail';
}, false);