Style links depending on file format
修改外部链接，email链接，pdf链接的样式
- /* external links */
- a[href^=http://]{
- padding-right:20px;
- background:url(external.gif)no-repeatcenterright;
- }
- /* emails */
- a[href^=mailto:]{
- padding-right:20px;
- background:url(email.png)no-repeatcenterright;
- }
- /* pdfs */
- a[href$=.pdf]{
- padding-right:20px;
- background:url(pdf.png)no-repeatcenterright;
