a[href^="http://"]{
       padding-right: 20px;    background: url(external.gif) no-repeat center right;}/* emails */a[href^="mailto:"]{
       padding-right: 20px;    background: url(email.png) no-repeat center right;}/* pdfs */a[href$=".pdf"]{
       padding-right: 20px;    background: url(pdf.png) no-repeat center right;}