function updatedates()
{
  if (document.getElementById("todayforward2").checked == true)
  {
    document.getElementById("d1").value="9/9/2010";
    document.getElementById("d2").value="";
    document.getElementById("todayforward").value="1";
  }
  else
  {
    document.getElementById("d1").value="";
    document.getElementById("d2").value="";
    document.getElementById("todayforward").value="";
  }
  document.getElementById("mainform").submit();
}

function showradius()
{
  var radiuselement;
  var sortbox;
  var zipelement;
  var filterbox;


  sortbox = document.getElementById("sort").value;
  filterbox = document.getElementById("filter").value;
  radiuselement = document.getElementById("radius");
  zipelement = document.getElementById("zip");

  if (sortbox == 'zip')
  {
    zipelement.style.display='block';
  }
  else
  {
    zipelement.style.display='none';
  }

  if (filterbox=="maxradius")
  {
    radiuselement.style.display='block';
    zipelement.style.display='block';
  }
  else
  {
    radiuselement.style.display='none';
  }
}