.ajou-gs-table tbody tr td:nth-of-type(2n-1){text-align:left;}
.ajou-gs-table tbody tr td a{display:inline-block;width:20px;height:20px;vertical-align:middle;}
.hwp{background:url(/_res/ajou/gs/img/common/ico-hwp.gif) no-repeat center;}
.doc{background:url(/_res/ajou/gs/img/common/ico-doc.gif) no-repeat center;}
.ppt{background:url(/_res/ajou/gs/img/common/ico-ppt.png) no-repeat center;}
.pdf{background:url(/_res/ajou/gs/img/common/ico-pdf.gif) no-repeat center;}
.xls{background:url(/_res/ajou/gs/img/common/ico-xls.gif) no-repeat center;}
.td-center{text-align:center !important;}