// JavaScript Document

ClickedArray = new Array();

function ClearField(id) 
{
  if ( ClickedArray[id] != 1 )
  {
    ClickedArray[id] = 1;
    document.getElementById(id).value = '';
  }
}

// set value back to original value
function CheckForNull(id, resetVal)
{
  if ( document.getElementById(id).value == "" )
  {
    ClickedArray[id] = 0;
    document.getElementById(id).value = resetVal;
  }
}