li.pdf{background:url('../images/pdf.gif') no-repeat;width:16px;height:16px}li.txt{width:16px;height:16px;background:transparent url('../images/txt.gif') no-repeat}li.docx{width:16px;height:16px;background:url('../images/icon_doc.gif') no-repeat}li.doc{width:16px;height:16px;background:url('../images/icon_doc.gif') no-repeat}li.wpd{width:16px;height:16px;background:url('../images/icon_doc.gif') no-repeat}li.odf{width:16px;height:16px;background:transparent url('../images/pdf.gif') no-repeat}li.xls{width:16px;height:16px;background:transparent url('../images/excel.jpg') no-repeat}li.xla{width:16px;height:16px;background:transparent url('../images/excel.jpg') no-repeat}li.xlt{width:25px;height:25px;background:transparent url('../images/excel.jpg') no-repeat}li.xlw{width:16px;height:16px;background:transparent url('../images/excel.jpg') no-repeat}li.dvx{width:16px;height:16px;background:transparent url('../images/film.gif') no-repeat}li.mp3{width:16px;height:16px;background:transparent url('../images/music.png') no-repeat}li.avi{width:16px;height:16px;background:transparent url('../images/film.gif') no-repeat}li.jpg{width:16px;height:16px;background:transparent url('../images/pic.gif') no-repeat}li.gif{width:16px;height:16px;background:transparent url('../images/pic.gif') no-repeat}li.bmp{width:16px;height:16px;background:transparent url('../images/pic.gif') no-repeat}li.tif{width:16px;height:16px;background:transparent url('../images/pic.gif') no-repeat}li.zip{width:16px;height:16px;background:transparent url('../images/zip.gif') no-repeat}li.tar{width:16px;height:16px;background:transparent url('../images/zip.gif') no-repeat}li.rar{width:16px;height:16px;background:transparent url('../images/zip.gif') no-repeat}li.set_pre{background-image:url('../images/icons.png');background-position:0px 8019px;width:16px;height:16px;border:solid;border-radius:none;box-shadow:none}table.main_grid li.png{width:16px;height:16px;background:transparent url('../images/pic.gif') no-repeat}table.main_grid li{display:block;float:left}