WordPress/wp-admin/js/user-profile.dev.js

(function($){

	function check_pass_strength() {
		var pass1 = $('#pass1').val(), user = $('#user_login').val(), pass2 = $('#pass2').val(), strength;

		$('#pass-strength-result').removeClass('short bad good strong');
		if ( ! pass1 ) {
			$('#pass-strength-result').html( pwsL10n.empty );
			return;
		}

		strength = passwordStrength(pass1, user, pass2);

		switch ( strength ) {
			case 2:
				$('#pass-strength-result').addClass('bad').html( pwsL10n['bad'] );
				break;
			case 3:
				$('#pass-strength-result').addClass('good').html( pwsL10n['good'] );
				break;
			case 4:
				$('#pass-strength-result').addClass('strong').html( pwsL10n['strong'] );
				break;
			case 5:
				$('#pass-strength-result').addClass('short').html( pwsL10n['mismatch'] );
				break;
			default:
				$('#pass-strength-result').addClass('short').html( pwsL10n['short'] );
		}
	}

	$(document).ready( function() {
		var select = $('#display_name');

		$('#pass1').val('').keyup( check_pass_strength );
		$('#pass2').val('').keyup( check_pass_strength );
		$('#pass-strength-result').show();
		$('.color-palette').click( function() {
			$(this).siblings('input[name="admin_color"]').prop('checked', true);
		});

		if ( select.length ) {
			$('#first_name, #last_name, #nickname').bind( 'blur.user_profile', function() {
				var dub = [],
					inputs = {
						display_nickname  : $('#nickname').val() || '',
						display_username  : $('#user_login').val() || '',
						display_firstname : $('#first_name').val() || '',
						display_lastname  : $('#last_name').val() || ''
					};

				if ( inputs.display_firstname && inputs.display_lastname ) {
					inputs['display_firstlast'] = inputs.display_firstname + ' ' + inputs.display_lastname;
					inputs['display_lastfirst'] = inputs.display_lastname + ' ' + inputs.display_firstname;
				}

				$.each( $('option', select), function( i, el ){
					dub.push( el.value );
				});

				$.each(inputs, function( id, value ) {
					if ( ! value )
						return;

					var val = value.replace(/<\/?[a-z][^>]*>/gi, '');

					if ( inputs[id].length && $.inArray( val, dub ) == -1 ) {
						dub.push(val);
						$('<option />', {
							'text': val
						}).appendTo( select );
					}
				});
			});
		}
	});

})(jQuery);