function sh_ShowHide()
{
  groupname=arguments[0];
  rows=arguments[1];
  if(arguments.length > 2)
  {
    if (arguments[2]==1)
    {
      var currRow = document.getElementById(groupname);
  		currRow.style.display="";
  		document.getElementById(groupname+"img").src = sh_HideImg;
    }
    else if (arguments[2]==0)
    {
      var currRow = document.getElementById(groupname);
  		currRow.style.display="none";
  		document.getElementById(groupname+"img").src = sh_ShowImg;
    }
  }
  else
  {
    if (rows == 0) 
    { /* for a single item */
      sh_RowShowHide(groupname);
  	}
    else
    { /* for multiple rows of a table */
      for(i=1; i <= rows; i++)
      {
        var tempRow = groupname + "" + i;
        sh_RowShowHide(tempRow);
      }
    }
  }
}
function sh_RowShowHide(sh_RowID) {
	var currRow = document.getElementById(sh_RowID);
	if (currRow.style.display=="none")
	{
		currRow.style.display="";
		document.getElementById(sh_RowID+"img").src = sh_HideImg;
	}
	else
	{
		currRow.style.display="none";
		document.getElementById(sh_RowID+"img").src = sh_ShowImg;
	}	
}