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http://www.jf-fukura.or.jp/theme_user/00032/theme_fukura01/js/jquery.easing.1.3.js

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1/*
2 * jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/
3 *
4 * Uses the built in easing capabilities added In jQuery 1.1
5 * to offer multiple easing options
6 *
7 * TERMS OF USE - jQuery Easing
8 * 
9 * Open source under the BSD License. 
10 * 
11 * Copyright © 2008 George McGinley Smith
12 * All rights reserved.
13 * 
14 * Redistribution and use in source and binary forms, with or without modification, 
15 * are permitted provided that the following conditions are met:
16 * 
17 * Redistributions of source code must retain the above copyright notice, this list of 
18 * conditions and the following disclaimer.
19 * Redistributions in binary form must reproduce the above copyright notice, this list 
20 * of conditions and the following disclaimer in the documentation and/or other materials 
21 * provided with the distribution.
22 * 
23 * Neither the name of the author nor the names of contributors may be used to endorse 
24 * or promote products derived from this software without specific prior written permission.
25 * 
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
27 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
29 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
31 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
32 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 
34 * OF THE POSSIBILITY OF SUCH DAMAGE. 
35 *
36*/
37
38// t: current time, b: begInnIng value, c: change In value, d: duration
39
40jQuery.easing['jswing'] = jQuery.easing['swing'];
41
42jQuery.extend( jQuery.easing,
43{
44	def: 'easeOutQuad',
45	swing: function (x, t, b, c, d) {
46		//alert(jQuery.easing.default);
47		return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
48	},
49	easeInQuad: function (x, t, b, c, d) {
50		return c*(t/=d)*t + b;
51	},
52	easeOutQuad: function (x, t, b, c, d) {
53		return -c *(t/=d)*(t-2) + b;
54	},
55	easeInOutQuad: function (x, t, b, c, d) {
56		if ((t/=d/2) < 1) return c/2*t*t + b;
57		return -c/2 * ((--t)*(t-2) - 1) + b;
58	},
59	easeInCubic: function (x, t, b, c, d) {
60		return c*(t/=d)*t*t + b;
61	},
62	easeOutCubic: function (x, t, b, c, d) {
63		return c*((t=t/d-1)*t*t + 1) + b;
64	},
65	easeInOutCubic: function (x, t, b, c, d) {
66		if ((t/=d/2) < 1) return c/2*t*t*t + b;
67		return c/2*((t-=2)*t*t + 2) + b;
68	},
69	easeInQuart: function (x, t, b, c, d) {
70		return c*(t/=d)*t*t*t + b;
71	},
72	easeOutQuart: function (x, t, b, c, d) {
73		return -c * ((t=t/d-1)*t*t*t - 1) + b;
74	},
75	easeInOutQuart: function (x, t, b, c, d) {
76		if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
77		return -c/2 * ((t-=2)*t*t*t - 2) + b;
78	},
79	easeInQuint: function (x, t, b, c, d) {
80		return c*(t/=d)*t*t*t*t + b;
81	},
82	easeOutQuint: function (x, t, b, c, d) {
83		return c*((t=t/d-1)*t*t*t*t + 1) + b;
84	},
85	easeInOutQuint: function (x, t, b, c, d) {
86		if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
87		return c/2*((t-=2)*t*t*t*t + 2) + b;
88	},
89	easeInSine: function (x, t, b, c, d) {
90		return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
91	},
92	easeOutSine: function (x, t, b, c, d) {
93		return c * Math.sin(t/d * (Math.PI/2)) + b;
94	},
95	easeInOutSine: function (x, t, b, c, d) {
96		return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
97	},
98	easeInExpo: function (x, t, b, c, d) {
99		return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
100	},
101	easeOutExpo: function (x, t, b, c, d) {
102		return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
103	},
104	easeInOutExpo: function (x, t, b, c, d) {
105		if (t==0) return b;
106		if (t==d) return b+c;
107		if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
108		return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
109	},
110	easeInCirc: function (x, t, b, c, d) {
111		return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
112	},
113	easeOutCirc: function (x, t, b, c, d) {
114		return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
115	},
116	easeInOutCirc: function (x, t, b, c, d) {
117		if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
118		return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
119	},
120	easeInElastic: function (x, t, b, c, d) {
121		var s=1.70158;var p=0;var a=c;
122		if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
123		if (a < Math.abs(c)) { a=c; var s=p/4; }
124		else var s = p/(2*Math.PI) * Math.asin (c/a);
125		return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
126	},
127	easeOutElastic: function (x, t, b, c, d) {
128		var s=1.70158;var p=0;var a=c;
129		if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
130		if (a < Math.abs(c)) { a=c; var s=p/4; }
131		else var s = p/(2*Math.PI) * Math.asin (c/a);
132		return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
133	},
134	easeInOutElastic: function (x, t, b, c, d) {
135		var s=1.70158;var p=0;var a=c;
136		if (t==0) return b;  if ((t/=d/2)==2) return b+c;  if (!p) p=d*(.3*1.5);
137		if (a < Math.abs(c)) { a=c; var s=p/4; }
138		else var s = p/(2*Math.PI) * Math.asin (c/a);
139		if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
140		return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
141	},
142	easeInBack: function (x, t, b, c, d, s) {
143		if (s == undefined) s = 1.70158;
144		return c*(t/=d)*t*((s+1)*t - s) + b;
145	},
146	easeOutBack: function (x, t, b, c, d, s) {
147		if (s == undefined) s = 1.70158;
148		return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
149	},
150	easeInOutBack: function (x, t, b, c, d, s) {
151		if (s == undefined) s = 1.70158; 
152		if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
153		return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
154	},
155	easeInBounce: function (x, t, b, c, d) {
156		return c - jQuery.easing.easeOutBounce (x, d-t, 0, c, d) + b;
157	},
158	easeOutBounce: function (x, t, b, c, d) {
159		if ((t/=d) < (1/2.75)) {
160			return c*(7.5625*t*t) + b;
161		} else if (t < (2/2.75)) {
162			return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
163		} else if (t < (2.5/2.75)) {
164			return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
165		} else {
166			return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
167		}
168	},
169	easeInOutBounce: function (x, t, b, c, d) {
170		if (t < d/2) return jQuery.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b;
171		return jQuery.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b;
172	}
173});
174
175/*
176 *
177 * TERMS OF USE - EASING EQUATIONS
178 * 
179 * Open source under the BSD License. 
180 * 
181 * Copyright © 2001 Robert Penner
182 * All rights reserved.
183 * 
184 * Redistribution and use in source and binary forms, with or without modification, 
185 * are permitted provided that the following conditions are met:
186 * 
187 * Redistributions of source code must retain the above copyright notice, this list of 
188 * conditions and the following disclaimer.
189 * Redistributions in binary form must reproduce the above copyright notice, this list 
190 * of conditions and the following disclaimer in the documentation and/or other materials 
191 * provided with the distribution.
192 * 
193 * Neither the name of the author nor the names of contributors may be used to endorse 
194 * or promote products derived from this software without specific prior written permission.
195 * 
196 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
197 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
198 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
199 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
200 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
201 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
202 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
203 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 
204 * OF THE POSSIBILITY OF SUCH DAMAGE. 
205 *
206 */

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