https://www.hatachikikin.com/wp-content/themes/hatachi/js/opacity-rollover2.1.js

1// JavaScript Document
2    /*=====================================================
3meta: {
4  title: "jquery-opacity-rollover.js",
5  version: "2.1",
6  copy: "copyright 2009 h2ham ([email protected])",
7  license: "MIT License(http://www.opensource.org/licenses/mit-license.php)",
8  author: "THE HAM MEDIA - http://h2ham.seesaa.net/",
9  date: "2009-07-21"
10  modify: "2009-07-23"
11}
12=====================================================*/
13(function($) {
14	
15	$.fn.opOver = function(op,oa,durationp,durationa){
16		
17		var c = {
18			op:op? op:1.0,
19			oa:oa? oa:0.6,
20			durationp:durationp? durationp:'fast',
21			durationa:durationa? durationa:'fast'
22		};
23		
24
25		$(this).each(function(){
26			$(this).css({
27					opacity: c.op,
28					filter: "alpha(opacity="+c.op*100+")"
29				}).hover(function(){
30					$(this).fadeTo(c.durationp,c.oa);
31				},function(){
32					$(this).fadeTo(c.durationa,c.op);
33				})
34		});
35	},
36	
37	$.fn.wink = function(durationp,op,oa){
38
39		var c = {
40			durationp:durationp? durationp:'slow',
41			op:op? op:1.0,
42			oa:oa? oa:0.2
43		};
44		
45		$(this).each(function(){
46			$(this)	.css({
47					opacity: c.op,
48					filter: "alpha(opacity="+c.op*100+")"
49				}).hover(function(){
50				$(this).css({
51					opacity: c.oa,
52					filter: "alpha(opacity="+c.oa*100+")"
53				});
54				$(this).fadeTo(c.durationp,c.op);
55			},function(){
56				$(this).css({
57					opacity: c.op,
58					filter: "alpha(opacity="+c.op*100+")"
59				});
60			})
61		});
62	}
63	
64})(jQuery);
65