Define an <img>'s src attribute in CSS

just this as img tag is a content element

img {
    content:url(http://example.com/image.png);
}

#divID {
    background-image: url("http://imageurlhere.com");
    background-repeat: no-repeat;
    width: auto; /*or your image's width*/
    height: auto; /*or your image's height*/
    margin: 0;
    padding: 0;
}

No there isn't. You can specify a background image but that's not the same thing.