Click/select Row in ASP.NET GridView or HTML Table

.selectedRow
{
color: #303030;
font-size:3em;
font-weight:bold;
}
.normalRow
{
color: #909090;
font-size:2em;
font-weight:normal;
}

function SelectRow(row) {
  // get all data rows - siblings to current
  var _rows = row.parentNode.childNodes;
  // deselect all data rows
  try {
     for (i = 0; i < _rows.length; i++) {
     _rows[i].getElementsByTagName("td")[0].className='normalRow';
      }
  }
  catch (e) { }
  // select current row (formatting applied to first cell)
row.getElementsByTagName("td")[0].className='selectedRow';
  }