function getObj(obj)
{
	if(document.getElementById)
		return(eval('document.getElementById(\'' + obj + '\')'))
	else if(document.all)
		return(eval('document.all.' + obj))
}



function ShowChildrenRows(num)
{
  for(i=1; i<3 ;i++)
    {
      row=getObj('child_row'+i);
      if(i<=num)
        row.style.display="";
      else
        row.style.display="none";
    }
}