function FocusStartField()
  {
   if (document.bf.StartDate.value=='DD/MM/YYYY') { document.bf.StartDate.value=''; }
   Calendar(1,36,0);
  }

function FocusEndField()
  {
   if (document.bf.EndDate.value=='DD/MM/YYYY') { document.bf.EndDate.value=''; }
   Calendar(2,72,0);
  }

function Calendar(type, mtop, mleft)
  {
   var FC = document.all.Cal;

   if (FC.style.display=='none')
     {
      FC.style.marginTop = mtop;
      FC.style.marginLeft = mleft; 
      if (type==1) { document.bf.calmode.value="1"; }
      else { document.bf.calmode.value="2"; }
      Cal.DisplayCalendar(-1,-1);
      FC.style.display = "block";
     }
   else { FC.style.display = "none"; }
  }