a.pdf {
  padding-left: 23px;
  background: transparent url("pdficon_small.gif") no-repeat top left;
  white-space: nowrap;
  display: block;
  height: 20px;
}
a.txt {
  padding-left: 23px;
  background: transparent url("txticon_small.gif") no-repeat top left;
  white-space: nowrap;
  display: block;
  height: 20px;
}
a.doc {
  padding-left: 23px;
  background: transparent url("docicon_small.gif") no-repeat top left;
  white-space: nowrap;
  display: block;
  height: 20px;
}
a.xls {
  padding-left: 23px;
  background: transparent url("xlsicon_small.gif") no-repeat top left;
  white-space: nowrap;
  display: block;
  height: 20px;
}
a.unknown {
  padding-left: 23px;
  background: transparent url("txticon_small.gif") no-repeat top left;
  white-space: nowrap;
  display: block;
  height: 20px;
}