var oINPUT_PETITION = {

  txtName_0:     'Last Name',
  txtName_1:     'First Name',
  txtPostalCode: 'Postal Code',
  txtEmail:      'Email (optional)'
};

jQuery( document ).ready( function () {

  // set focus
  jQuery( 'input:text:first' ).focus();

  // initialize click/blur events
  jQuery( 'input' ).click( function () { jQuery( this ).attr( 'value', '' ); } );
  jQuery( 'form#formPetition input' ).blur( function () { if (jQuery( this ).attr( 'value' ) == '') { jQuery( this ).attr( 'value', oINPUT_PETITION[jQuery( this ).attr( 'id' )] ); } } );

} );