js选中行高亮

.t1
{
  clear: both;
  border: 1px solid #c9dae4;
}
.t1 tr th
{
  color: #0d487b;
  background: #f2f4f8 url(../CSS/Table/images/sj_title_pp.jpg) repeat-x left bottom;
  line-height: 28px;
  border-bottom: 1px solid #9cb6cf;
  border-top: 1px solid #e9edf3;
  font-weight: normal;
  text-shadow: #e6ecf3 1px 1px 0px;
  padding-left: 5px;
  padding-right: 5px;
}
.t1 tr td
{
  border-bottom: 1px solid #e9e9e9;
  padding-bottom: 5px;
  padding-top: 5px;
  color: #444;
  border-right: 1px solid #e9e9e9;
  border-left: 1px solid #e9e9e9;
  border-top: 1px solid #FFFFFF;
  padding-left: 5px;
  padding-right: 5px;
  word-break: break-all;
}
/* white-space:nowrap; text-overflow:ellipsis; */
tr.alt td
{
  background: #ecf6fc; /*这行将给所有的tr加上背景色*/
}
tr.over td
{
  background: #bcd4ec; /*这个将是鼠标高亮行的背景色*/
}

以上为style部分