Easing with jQuery

easing.js

//t: current time, b: begInnIng value, c: change In value, d: duration jQuery.easing['jswing'] = jQuery.easing['swing'];
 jQuery.extend( jQuery.easing, { def: 'easeOutQuad', swing: function (x, t, b, c, d) { 
 //alert(jQuery.easing.default);
 return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
  }, 
  easeInQuad: function (x, t, b, c, d) { 
  	return c*(t/=d)*t + b;
  	}, 
  	easeOutQuad: function (x, t, b, c, d) { 
  		return -c *(t/=d)*(t-2) + b;
  		}, 
  		easeInOutQuad: function (x, t, b, c, d) { if ((t/=d/2) < 1) return c/2*t*t + b; 
  			return -c/2 * ((--t)*(t-2) - 1) + b; 
  		}, 
  			easeInCubic: function (x, t, b, c, d) { 
  				return c*(t/=d)*t*t + b; 
  			}, 
  			easeOutCubic: function (x, t, b, c, d) { 
  				return c*((t=t/d-1)*t*t + 1) + b; }, 
  			easeInOutCubic: function (x, t, b, c, d) { 
  				if ((t/=d/2) < 1) return c/2*t*t*t + b; return c/2*((t-=2)*t*t + 2) + b; 
  			}, easeInQuart: function (x, t, b, c, d) { return c*(t/=d)*t*t*t + b; }, 
  			easeOutQuart: function (x, t, b, c, d) { return -c * ((t=t/d-1)*t*t*t - 1) + b; }, 
  			easeInOutQuart: function (x, t, b, c, d) { 
  				if ((t/=d/2) < 1) return c/2*t*t*t*t + b; 
  				return -c/2 * ((t-=2)*t*t*t - 2) + b; 
  			}, easeInQuint: function (x, t, b, c, d) { 
  				return c*(t/=d)*t*t*t*t + b; }, easeOutQuint: function (x, t, b, c, d) { 
  					return c*((t=t/d-1)*t*t*t*t + 1) + b; }, easeInOutQuint: function (x, t, b, c, d) { 
  						if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b; return c/2*((t-=2)*t*t*t*t + 2) + b; }, 
  						easeInSine: function (x, t, b, c, d) { return -c * Math.cos(t/d * (Math.PI/2)) + c + b; }, 
  						easeOutSine: function (x, t, b, c, d) { return c * Math.sin(t/d * (Math.PI/2)) + b; }, 
  						easeInOutSine: function (x, t, b, c, d) { return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b; }, 
  						easeInExpo: function (x, t, b, c, d) { return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b; }, 
  						easeOutExpo: function (x, t, b, c, d) { return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b; }, 
  						easeInOutExpo: function (x, t, b, c, d) { if (t==0) return b; 
  							if (t==d) return b+c; 
  							if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b; 
  							return c/2 * (-Math.pow(2, -10 * --t) + 2) + b; }, 
  							easeInCirc: function (x, t, b, c, d) { 
  								return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b; }, 
  								easeOutCirc: function (x, t, b, c, d) { return c * Math.sqrt(1 - (t=t/d-1)*t) + b; }, 
  						easeInOutCirc: function (x, t, b, c, d) { if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b; 
  							return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b; }, 
  							easeInElastic: 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; }, 
  							easeOutElastic: 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; }, 
  							easeInOutElastic: 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; }, 
  							easeInBack: function (x, t, b, c, d, s) { if (s == undefined) s = 1.70158; return c*(t/=d)*t*((s+1)*t - s) + b; }, 
  							easeOutBack: function (x, t, b, c, d, s) { if (s == undefined) s = 1.70158; return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b; }, 
  							easeInOutBack: function (x, t, b, c, d, s) { if (s == undefined) 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; }, 
  						easeInBounce: function (x, t, b, c, d) { return c - jQuery.easing.easeOutBounce (x, d-t, 0, c, d) + b; }, 
  						easeOutBounce: 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; 
  						} }, 
  						easeInOutBounce: function (x, t, b, c, d) { if (t < d/2) return jQuery.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b; 
  							return jQuery.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b; 
  						} });