SpGridView GroupBy Problem

When you implement a group by by default all groups will be in Expanded Mode. This is a bug with SpGridView. If You keep the below scripy within your WebPart page then by default SpGridview will collapse all the Group By's to Collapsed Mode.
function ShowCollapsed()
{
 var rows = document.getElementsByTagName('tr');
 var numRows = rows.length;
 for (var i = 0; i < numRows; ++i)
 {
    if (rows[i].getAttribute("isexp") != null &&
rows[i].getAttribute("isexp").toLowerCase() == "true")
    {
          if(rows[i].firstChild.firstChild != null &&
rows[i].firstChild.firstChild.tagName.toLowerCase() == "a")
          {
              if (rows[i].firstChild.firstChild.title.toLowerCase() ==
"expand/collapse")
                  {
                    rows[i].firstChild.firstChild.fireEvent("onclick");
                  }
          }
     }

  }
}
_spBodyOnLoadFunctionNames.push("ShowCollapsed");