var cleared = false;

function showProcessing()
{

 var form = document.getElementById('Form1');
 form.style.display = 'none';

 var box = document.getElementById('processing');
 box.style.display = 'block';

}

function clearBox(boxID)
{
 if (!cleared)
 {
  var box = document.getElementById(boxID);
  box.value = '';
  box.style.color = '#000000';
  cleared = true;
 }
}