function clearFieldDefault( theField )
{
  if (theField.value == theField.defaultValue)
  {
    theField.value = '';	
  }	
}

function rollOver( imgName, imgState )
{
  if ( document.images )
  {
    document.images[ imgName ].src = eval( imgName + '_' + imgState + '.src' );
  } 
}