JAVASCRIPT

change background image with jquery

jQuery(document).ready(function($) {
    $('.bg-image').css("background-image", "url('myurl.jpg')");
});

jquery set style background image

$('myObject').css('background-image', 'url(' + imageUrl + ')');

jquery add style background-image

$('myObject').css('background-image', 'url(' + imageUrl + ')');

set background image URL jQuery

jQuery('selector').css('background-image'); // gets the image URL
jQuery('selector').css('background-image', 'path/to/image.jpg'); // sets the image URL