/*
* jQuery Easing v1.1 - http://gsgd.co.uk/sandbox/jquery.easing.php
*
* Uses the built in easing capabilities added in jQuery 1.1
* to offer multiple easing options
*
* Copyright (c) 2007 George Smith
* Licensed under the MIT License:
*   http://www.opensource.org/licenses/mit-license.php
*/

jQuery.easing = {
    easein: function(x, t, b, c, d) {
        return c * (t /= d) * t + b; // in
    },
    easeinout: function(x, t, b, c, d) {
        if (t < d / 2) return 2 * c * t * t / (d * d) + b;
        var ts = t - d / 2;
        return -2 * c * ts * ts / (d * d) + 2 * c * ts / d + c / 2 + b;
    },
    easeout: function(x, t, b, c, d) {
        return -c * t * t / (d * d) + 2 * c * t / d + b;
    },
    expoin: function(x, t, b, c, d) {
        var flip = 1;
        if (c < 0) {
            flip *= -1;
            c *= -1;
        }
        return flip * (Math.exp(Math.log(c) / d * t)) + b;
    },
    expoout: function(x, t, b, c, d) {
        var flip = 1;
        if (c < 0) {
            flip *= -1;
            c *= -1;
        }
        return flip * (-Math.exp(-Math.log(c) / d * (t - d)) + c + 1) + b;
    },
    expoinout: function(x, t, b, c, d) {
        var flip = 1;
        if (c < 0) {
            flip *= -1;
            c *= -1;
        }
        if (t < d / 2) return flip * (Math.exp(Math.log(c / 2) / (d / 2) * t)) + b;
        return flip * (-Math.exp(-2 * Math.log(c / 2) / d * (t - d)) + c + 1) + b;
    },
    bouncein: function(x, t, b, c, d) {
        return c - jQuery.easing['bounceout'](x, d - t, 0, c, d) + b;
    },
    bounceout: function(x, t, b, c, d) {
        if ((t /= d) < (1 / 2.75)) {
            return c * (7.5625 * t * t) + b;
        } else if (t < (2 / 2.75)) {
            return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b;
        } else if (t < (2.5 / 2.75)) {
            return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b;
        } else {
            return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
        }
    },
    bounceinout: function(x, t, b, c, d) {
        if (t < d / 2) return jQuery.easing['bouncein'](x, t * 2, 0, c, d) * .5 + b;
        return jQuery.easing['bounceout'](x, t * 2 - d, 0, c, d) * .5 + c * .5 + b;
    },
    elasin: function(x, t, b, c, d) {
        var s = 1.70158; var p = 0; var a = c;
        if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3;
        if (a < Math.abs(c)) { a = c; var s = p / 4; }
        else var s = p / (2 * Math.PI) * Math.asin(c / a);
        return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
    },
    elasout: function(x, t, b, c, d) {
        var s = 1.70158; var p = 0; var a = c;
        if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3;
        if (a < Math.abs(c)) { a = c; var s = p / 4; }
        else var s = p / (2 * Math.PI) * Math.asin(c / a);
        return a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b;
    },
    elasinout: function(x, t, b, c, d) {
        var s = 1.70158; var p = 0; var a = c;
        if (t == 0) return b; if ((t /= d / 2) == 2) return b + c; if (!p) p = d * (.3 * 1.5);
        if (a < Math.abs(c)) { a = c; var s = p / 4; }
        else var s = p / (2 * Math.PI) * Math.asin(c / a);
        if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
        return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b;
    },
    backin: function(x, t, b, c, d) {
        var s = 1.70158;
        return c * (t /= d) * t * ((s + 1) * t - s) + b;
    },
    backout: function(x, t, b, c, d) {
        var s = 1.70158;
        return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
    },
    backinout: function(x, t, b, c, d) {
        var s = 1.70158;
        if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
        return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
    },
    linear: function(x, t, b, c, d) {
        return c * t / d + b; //linear
    }
};