$(function() {
	$( 'input[name=Username]' ).data( 'background-off', '#fff url(/images/login-watermark.gif) 0 0 no-repeat' );
	$( 'input[name=Password]' ).data( 'background-off', '#fff url(/images/login-watermark.gif) 0 -16px no-repeat' );
	$( 'input[name=Username], input[name=Password]' )
	.data( 'background-on', '#fff none 0 0 no-repeat' )
	.focus( function() {
		$(this).css( 'background', $(this).data( 'background-on' ) );
	} )
	.blur( function() {
		$(this).css( 'background', $(this).data( 'background-' + ( $(this).val() ? 'on' : 'off' ) ) );
	} )
	.blur();
})();