//work in IE7 IE8b2 FF2 FF3 SF3.1 OP

a[href^='http://'] {
    padding-right: 15px;
    background: url(extern.gif) right no-repeat;
}
a[href^='http://www.OWNDOMAIN.com'],
a[href^='http://OWNDOMAIN.com'] {
    padding-right: 0;
    background: none;
}
a[href^='mailto:'] {
    padding-right: 15px;
    background: url(mail.gif) right no-repeat;
}
a[href^='mailto:USER'] {
    padding-right: 15px;
    background: url(USERPIC.gif) right no-repeat;
}