function getImage() { var image = new Array(); var number = 0; image[number++] = 'http://www.2mc.nl/gallery/banner11232549782.jpg'; image[number++] = 'http://www.2mc.nl/gallery/header_schelstr-021233678564.jpg'; image[number++] = 'http://www.2mc.nl/gallery/header_schelstr-031233678564.jpg'; increment = Math.floor(Math.random() * number); $("#banner").css("background", "url('" + image[increment] + "') no-repeat top left"); }