https://www.teclovers.com/js/jquery.hint.js

1(function($){
2	"use strict";
3	var defaults = {
4		hintClass: "hint"
5	};
6
7	var methods =
8	{
9		init : function(options){
10			return this.each(function(){
11				options = $.extend(defaults, options);
12				if($(this).attr("placeholder")==$(this).val())
13					$(this).addClass(options.hintClass);
14				$(this).focus(function(){
15					if($(this).attr("placeholder")==$(this).val())
16						$(this).val("").removeClass(options.hintClass);
17				});
18				$(this).blur(function(){
19					if($(this).val()=="")
20						$(this).val($(this).attr("placeholder")).addClass(options.hintClass);
21				});
22			});
23		}
24	};
25
26	jQuery.fn.hint = function(method){
27		if(methods[method])
28			return methods[method].apply(this, arguments);
29		else if(typeof(method)==='object' || !method)
30			return methods.init.apply(this, arguments);
31	};
32})(jQuery);