A simple jQuery snippet to swap the image source / attribute on load:-
jQuery(function($) {
//caches a jQuery object containing the image element
var branding = $(".your-class img");
function swapImage() {
branding.attr('src', '/dir/image.png');
}
swapImage();
});
About the Author

Glenn
A highly experienced Web Designer / Web Developer (Webflow, WordPress, Weebly & Custom), Front-end / Back-end Developer & New Media Specialist, with extensive knowledge of a wide spectrum of technologies in the Development and Creative Industries, built up over a number of years.