// <!-- Hide script from older browsers

var hemisphere='';
var satellite='';

function wform_change(thisField,thisValue)
{
  var index;
  var hemis_numberOfelements = document.wform.hemis.length;
  var param_numberOfelements = document.wform.param.length;
  var satellite_numberOfelements = document.wform.satellite.length;

  // ----- DETERMINE WHICH HEMIS RADIO BUTTONS IS SELECTED ----

  for (index = 0 ; index < hemis_numberOfelements ; index++) {
    if (document.wform.hemis[index].checked == true) {
      hemisphere=document.wform.hemis[index].value;
      break;
    }
  }

//  for (index = 0 ; index < param_numberOfelements ; index++) {
//    if (document.wform.param[index].checked == true) {
//      parameter=document.wform.param[index].value;
//      break;
//    }
//  }

//  for (index = 0 ; index < satellite_numberOfelements ; index++) {
//    if (document.wform.satellite[index].checked == true) {
//      satellite=document.wform.satellite[index].value;
//      break;
//    }
//  }

  // ============= CONSTRUCT NEW SRC FOR BOTTOM FRAME =====================


  var new_src_parent_dir='./';
  var new_src=new_src_parent_dir+hemisphere+'_images.html';

  window.top.bottomframe.location.href=new_src;      // Display the image

}

// End hiding script -->