User:Stranger195/common.css

{   background: url("http://upload.wikimedia.org/wikipedia/commons/b/ba/Page_white_excel.png") center right no-repeat; padding-right: 18px; }
 * 1) content a[href$=".xls"].external,
 * 2) content a[href$=".XLS"].external,
 * 3) content a[href$=".xlsx"].external,
 * 4) content a[href$=".XLSX"].external