/**
 * jQuery xcolor plugin
 * Copyright (c) 2010, Robert Eisele (robert@xarg.org)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * Date: 06/21/2010
 *
 * @author Robert Eisele
 * @version 1.5
 *
 * @see http://www.xarg.org/project/jquery-color-plugin-xcolor/
 **/

(function ($) {

	// http://www.w3.org/TR/css3-color/#svg-color
	var color_names = {
		transparent: 16777216,
		aliceblue: 15792383,
		antiquewhite: 16444375,
		aqua: 65535,
		aquamarine: 8388564,
		azure: 15794175,
		beige: 16119260,
		bisque: 16770244,
		black: 0,
		blanchedalmond: 16772045,
		blue: 255,
		blueviolet: 9055202,
		brown: 10824234,
		burlywood: 14596231,
		cadetblue: 6266528,
		chartreuse: 8388352,
		chocolate: 13789470,
		coral: 16744272,
		cornflowerblue: 6591981,
		cornsilk: 16775388,
		crimson: 14423100,
		cyan: 65535,
		darkblue: 139,
		darkcyan: 35723,
		darkgoldenrod: 12092939,
		darkgray: 11119017,
		darkgreen: 25600,
		darkgrey: 11119017,
		darkkhaki: 12433259,
		darkmagenta: 9109643,
		darkolivegreen: 5597999,
		darkorange: 16747520,
		darkorchid: 10040012,
		darkred: 9109504,
		darksalmon: 15308410,
		darkseagreen: 9419919,
		darkslateblue: 4734347,
		darkslategray: 3100495,
		darkslategrey: 3100495,
		darkturquoise: 52945,
		darkviolet: 9699539,
		deeppink: 16716947,
		deepskyblue: 49151,
		dimgray: 6908265,
		dimgrey: 6908265,
		dodgerblue: 2003199,
		firebrick: 11674146,
		floralwhite: 16775920,
		forestgreen: 2263842,
		fuchsia: 16711935,
		gainsboro: 14474460,
		ghostwhite: 16316671,
		gold: 16766720,
		goldenrod: 14329120,
		gray: 8421504,
		green: 32768,
		greenyellow: 11403055,
		grey: 8421504,
		honeydew: 15794160,
		hotpink: 16738740,
		indianred: 13458524,
		indigo: 4915330,
		ivory: 16777200,
		khaki: 15787660,
		lavender: 15132410,
		lavenderblush: 16773365,
		lawngreen: 8190976,
		lemonchiffon: 16775885,
		lightblue: 11393254,
		lightcoral: 15761536,
		lightcyan: 14745599,
		lightgoldenrodyellow: 16448210,
		lightgray: 13882323,
		lightgreen: 9498256,
		lightgrey: 13882323,
		lightpink: 16758465,
		lightsalmon: 16752762,
		lightseagreen: 2142890,
		lightskyblue: 8900346,
		lightslategray: 7833753,
		lightslategrey: 7833753,
		lightsteelblue: 11584734,
		lightyellow: 16777184,
		lime: 65280,
		limegreen: 3329330,
		linen: 16445670,
		magenta: 16711935,
		maroon: 8388608,
		mediumaquamarine: 6737322,
		mediumblue: 205,
		mediumorchid: 12211667,
		mediumpurple: 9662683,
		mediumseagreen: 3978097,
		mediumslateblue: 8087790,
		mediumspringgreen: 64154,
		mediumturquoise: 4772300,
		mediumvioletred: 13047173,
		midnightblue: 1644912,
		mintcream: 16121850,
		mistyrose: 16770273,
		moccasin: 16770229,
		navajowhite: 16768685,
		navy: 128,
		oldlace: 16643558,
		olive: 8421376,
		olivedrab: 7048739,
		orange: 16753920,
		orangered: 16729344,
		orchid: 14315734,
		palegoldenrod: 15657130,
		palegreen: 10025880,
		paleturquoise: 11529966,
		palevioletred: 14381203,
		papayawhip: 16773077,
		peachpuff: 16767673,
		peru: 13468991,
		pink: 16761035,
		plum: 14524637,
		powderblue: 11591910,
		purple: 8388736,
		red: 16711680,
		rosybrown: 12357519,
		royalblue: 4286945,
		saddlebrown: 9127187,
		salmon: 16416882,
		sandybrown: 16032864,
		seagreen: 3050327,
		seashell: 16774638,
		sienna: 10506797,
		silver: 12632256,
		skyblue: 8900331,
		slateblue: 6970061,
		slategray: 7372944,
		slategrey: 7372944,
		snow: 16775930,
		springgreen: 65407,
		steelblue: 4620980,
		tan: 13808780,
		teal: 32896,
		thistle: 14204888,
		tomato: 16737095,
		turquoise: 4251856,
		violet: 15631086,
		wheat: 16113331,
		white: 16777215,
		whitesmoke: 16119285,
		yellow: 16776960,
		yellowgreen: 10145074
	};

	/**
     * @constructor
     */
	function xColor(color) {

		function _normalize(n, s) {

			var m;

			if (void 0 !== n) {
				n = parseFloat(n);
			}

			if (void 0 === s) {
				s = 255;
				m = 255;
			} else if (1 === s) {

				if (void 0 === n || 1 === n) {
					return 1;
				}
				s = 100;
				m = 1;
			} else {
				m = s;
			}

			if (isNaN(n) || n <= 0) {
				return 0;
			}

			if (s < n) {
				return m;
			}

			if (n < 1 || 1 === s) {
				if (m === 1) {
					return n;
				} else {
					return (n * m) | 0;
				}
			}
			return n * m / s;
		}

		function _hsl(h,s,l) {

			h = _normalize(h, 360) / 360;
			s = _normalize(s, 1);
			l = _normalize(l, 1);

			if (0 === s) {
				l = Math.round(l * 255);
				return [l, l, l];
			}

			function _hue(v1, v2, h) {
				if (h < 0) ++h;
				if (h > 1) --h;
				if (6 * h < 1) return v1 + (v2 - v1) * 6 * h;
				if (2 * h < 1) return v2;
				if (3 * h < 2) return v1 + (v2 - v1) * (4 - 6 * h);
				return v1;
			}

			var v = l < 0.5 ? (l + l * s) : (l + s - l * s);
			var m = l + l - v;

			return [
			Math.round(255 *_hue(m, v, h + 1 / 3)),
			Math.round(255 *_hue(m, v, h)),
			Math.round(255 *_hue(m, v, h - 1 / 3)) ];
		}

		function _hsv(h,s,v) {

			h = _normalize(h, 360) / 60;
			s = _normalize(s, 1);
			v = _normalize(v, 1);

			var hi = h|0;
			var f = h - hi;

			f = (h & 1) ? f : 1 - f;

			var m = Math.round(255 * (v * (1 - s)));
			var n = Math.round(255 * (v * (1 - s * f)));

			v = Math.round(255 * v);

			switch (hi) {
				case 6:
				case 0:
					return [v, n, m];
				case 1:
					return [n, v, m];
				case 2:
					return [m, v, n];
				case 3:
					return [m, n, v];
				case 4:
					return [n, m, v];
				case 5:
					return [v, m, n];
			}
		}

		this.setColor = function (color) {

			this.success = true;

			if (typeof color === "number") {

				this.a =((color >> 24) & 0xff) / 255;
				this.r = (color >> 16) & 0xff;
				this.g = (color >>  8) & 0xff;
				this.b = (color      ) & 0xff;
				return;
			}

			while (typeof color === "object") {

				if (0 in color && 1 in color && 2 in color) {
					this.a = _normalize(color[3], 1);
					this.r = _normalize(color[0]);
					this.g = _normalize(color[1]);
					this.b = _normalize(color[2]);
					return;
				} else if ('r' in color && 'g' in color && 'b' in color) {
					this.a = _normalize(color.a, 1);
					this.r = _normalize(color.r);
					this.g = _normalize(color.g);
					this.b = _normalize(color.b);
					return;
				} else if ('h' in color && 's' in color) {

					var rgb;

					if ('l' in color) {
						rgb = _hsl(color.h, color.s, color.l);
					} else if ('v' in color) {
						rgb = _hsv(color.h, color.s, color.v);
					} else if ('b' in color) {
						rgb = _hsv(color.h, color.s, color.b);
					} else {
						break;
					}

					this.a = _normalize(color.a, 1);
					this.r = rgb[0];
					this.g = rgb[1];
					this.b = rgb[2];
					return;
				}
				break;
			}

			if (typeof color !== "string") {
				this.success = false;
				return;
			}

			color = color.toLowerCase().replace(/[^a-z0-9,.()#%]/g, '');

			var part, c;

			if (color in color_names) {

				c = color_names[color];

				this.a =(!((c >> 24) & 0xff))|0;
				this.r =  ((c >> 16) & 0xff);
				this.g =  ((c >>  8) & 0xff);
				this.b =  ((c      ) & 0xff);
				return;
			}

			// 53892983
			if (part = /^([1-9]\d*)$/.exec(color)) {

				c = parseInt(part[1], 10);

				this.a =(((c >> 24) & 0xff) || 255) / 255;
				this.r = ((c >> 16) & 0xff);
				this.g = ((c >>  8) & 0xff);
				this.b = ((c      ) & 0xff);
				return;
			}

			// #ff9000, #ff0000
			if (part = /^#?([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/.exec(color)) {
				this.a = 1;
				this.r = parseInt(part[1], 16);
				this.g = parseInt(part[2], 16);
				this.b = parseInt(part[3], 16);
				return;
			}

			// #f00, fff
			if (part = /^#?([0-9a-f])([0-9a-f])([0-9a-f])$/.exec(color)) {
				this.a = 1;
				this.r = parseInt(part[1] + part[1], 16);
				this.g = parseInt(part[2] + part[2], 16);
				this.b = parseInt(part[3] + part[3], 16);
				return;
			}

			// rgb(1, 234, 56)
			if (part = /^rgba?\((\d{1,3}),(\d{1,3}),(\d{1,3})(,([0-9.]+))?\)$/.exec(color)) {
				this.a = _normalize(part[5], 1);
				this.r = _normalize(part[1]);
				this.g = _normalize(part[2]);
				this.b = _normalize(part[3]);
				return;
			}

			// rgb(66%, 55%, 44%) in [0,100]%, [0,100]%, [0,100]%
			if (part = /^rgba?\(([0-9.]+\%),([0-9.]+\%),([0-9.]+\%)(,([0-9.]+)\%?)?\)$/.exec(color)) {
				this.a = _normalize(part[5], 1);
				this.r = Math.round(_normalize(part[1], 100) * 2.55);
				this.g = Math.round(_normalize(part[2], 100) * 2.55);
				this.b = Math.round(_normalize(part[3], 100) * 2.55);
				return;
			}

			// hsv(64, 40, 16) in [0, 360], [0,100], [0,100]
			if (part = /^hs([bvl])a?\((\d{1,3}),(\d{1,3}),(\d{1,3})(,([0-9.]+))?\)$/.exec(color)) {
				var func;
				if (part[1] === "l") {
					func = _hsl;
				} else {
					func = _hsv;
				}

				c = func(parseInt(part[2], 10), parseInt(part[3], 10), parseInt(part[4], 10));

				this.a = _normalize(part[6], 1);
				this.r = c[0];
				this.g = c[1];
				this.b = c[2];
				return;
			}

			// 1, 234, 56
			if (part = /^(\d{1,3}),(\d{1,3}),(\d{1,3})(,([0-9.]+))?$/.exec(color)) {
				this.a = _normalize(part[5], 1);
				this.r = _normalize(part[1]);
				this.g = _normalize(part[2]);
				this.b = _normalize(part[3]);
				return;
			}

			this.success = false;
		}

		this.getColor = function (type) {

			if (void 0 !== type) switch (type.toLowerCase()) {
				case "rgb":
					return this.getRGB();
				case "hsv":
				case "hsb":
					return this.getHSV();
				case "hsl":
					return this.getHSL();
				case "int":
					return this.getInt();
				case "array":
					return this.getArray();
				case "fraction":
					return this.getFraction();
				case "css":
				case "style":
					return this.getCSS();
				case "name":
					return this.getName();
			}
			return this.getHex();
		}

		this.getRGB = function () {

			if (this.success) {

				return {
					r: this.r,
					g: this.g,
					b: this.b,
					a: this.a
				};
			}
			return null;
		}

		this.getCSS = function () {

			if (this.success) {

				if (this.a == 1) {
					return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
				}
				return 'rgba(' + this.r + ', ' + this.g + ', ' + this.b + ', ' + this.a + ')';
			}
			return null;
		}

		this.getArray = function () {

			if (this.success) {
				return [this.r, this.g, this.b, this.a * 100 | 0];
			}
			return null;
		}

		this.getName = function () {

			if (this.success) {

				var lowest = null;
				var lowest_ndx;

				var table = color_names;

				var a = this.getHSL();

				for (var i in table) {

					/* We do not handle transparency */
					var b = new xColor(table[i]).getHSL();

					var tmp = Math.sqrt(0.5 * (a.h - b.h) * (a.h - b.h) + 0.5 * (a.s - b.s) * (a.s - b.s) + (a.l - b.l) * (a.l - b.l));

					if (null === lowest || tmp < lowest) {
						lowest = tmp;
						lowest_ndx = i;
					}
				}
				return lowest_ndx;
			}
			return null;
		}

		this.getFraction = function () {

			if (this.success) {

				return {
					r: this.r / 255,
					g: this.g / 255,
					b: this.b / 255,
					a: this.a
				};
			}
			return null;
		}

		this.getHSL = function () {

			// inspiration: http://130.113.54.154/~monger/hsl-rgb.html
			if (this.success) {

				var r = this.r / 255;
				var g = this.g / 255;
				var b = this.b / 255;

				var min = Math.min(r, g, b);
				var max = Math.max(r, g, b);
				var delta = max - min;

				var h, s, l = (max + min) / 2;

				if (0 == delta) {
					h = 0;
					s = 0;
				} else {

					if (max == r) {
						h = (g - b) / delta;
					} else if (max == g) {
						h = 2 + (b - r) / delta;
					} else if (max == b) {
						h = 4 + (r - g) / delta;
					}

					if (h < 0) {
						h+= 6;
					}
					s = delta / (l < 0.5 ? max + min : 2 - max - min);
				}
				return {
					h: Math.round(h * 60),
					s: Math.round(s * 100),
					l: Math.round(l * 100),
					a: this.a
				};
			}
			return null;
		}

		this.getHSV = function () {

			if (this.success) {

				var r = this.r / 255;
				var g = this.g / 255;
				var b = this.b / 255;

				var min = Math.min(r, g, b);
				var max = Math.max(r, g, b);
				var delta = max - min;

				var h, s, v = max;

				if (0 == delta) {
					h = 0;
					s = 0;
				} else {
					s = delta / max;

					delta*= 6;

					var dR = .5 + (max - r) / delta;
					var dG = .5 + (max - g) / delta;
					var dB = .5 + (max - b) / delta;

					if (r == max) {
						h = dB - dG;
					} else if (g == max) {
						h = 1 / 3 + dR - dB;
					} else if (b == max) {
						h = 2 / 3 + dG - dR;
					}

					if (h < 0) ++h;
					if (h > 1) --h;
				}

				return {
					h: Math.round(h * 360),
					s: Math.round(s * 100),
					v: Math.round(v * 100),
					a: this.a
				};
			}
			return null;
		}

		this.getHex = function () {

			if (this.success) {

				var chars = "0123456789abcdef";

				var r1 = this.r >> 4;
				var g1 = this.g >> 4;
				var b1 = this.b >> 4;

				var r2 = this.r & 0xf;
				var g2 = this.g & 0xf;
				var b2 = this.b & 0xf;

				if (0 === ((r1 ^ r2) | (g1 ^ g2) | (b1 ^ b2))) {
					return '#' + chars.charAt(r1) + chars.charAt(g1) + chars.charAt(b1);
				}
				return '#'
				+ chars.charAt(r1) + chars.charAt(r2)
				+ chars.charAt(g1) + chars.charAt(g2)
				+ chars.charAt(b1) + chars.charAt(b2);
			}
			return null;
		}

		this.getInt = function (alpha) {

			if (this.success) {
				if (void 0 !== alpha) {
					return ((this.a * 100 | 0) << 24 ^ this.r << 16 ^ this.g << 8 ^ this.b);
				}
				return (this.r << 16 ^ this.g << 8 ^ this.b) & 0xffffff;
			}
			return null;
		}

		this.toString = function () {
			return this.getHex();
		}

		this.setColor(color);
	}

	$.each(['color', 'backgroundColor', 'borderColor', 'borderTopColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'outlineColor'], function(i, attr) {

		$.fx.step[attr] = function(fx) {

			if (fx.xinit === void 0) {

				if (typeof fx.end === "string" && -1 !== fx.end.indexOf(";")) {

					var x, arr = fx.end.split(";");

					if (arr.length > 2) {

						for (x in arr) {
							if (-1 === arr[x].indexOf('native')) {
								arr[x] = new xColor(arr[x]);
							} else {
								arr[x] = findColor(fx.elem, attr);
							}
						}
						fx.start = null;
						fx.end = arr;
					} else {
						fx.start = new xColor(arr[0]);
						fx.end = new xColor(arr[1]);
					}
				} else {
					fx.start = findColor(fx.elem, attr);
					fx.end = new xColor(fx.end);
				}

				fx.xinit = 1;
			}

			var S = fx.start;
			var E = fx.end;
			var P = fx.pos;

			if (null === S) {
				var m = P * (E.length - 1), n = P < 1 ? m | 0 : E.length - 2;
				S = E[n];
				E = E[n + 1];
				P = m - n;
			}

			if ($.support.opacity) {
				fx.elem.style[attr] = "rgba("
				+ ((S.r + (E.r - S.r) * P)|0) + ","
				+ ((S.g + (E.g - S.g) * P)|0) + ","
				+ ((S.b + (E.b - S.b) * P)|0) + ","
				+ ((S.a + (E.a - S.a) * P)) + ")";
			} else {
				fx.elem.style[attr] = "rgb("
				+ ((S.r + (E.r - S.r) * P)|0) + ","
				+ ((S.g + (E.g - S.g) * P)|0) + ","
				+ ((S.b + (E.b - S.b) * P)|0) + ")";
			}
		}
	});

	function findColor(elem, attr) {

		var color = "";

		do {
			color = $.curCSS(elem, attr);

			if ("" !== color && "transparent" !== color && "rgba(0, 0, 0, 0)" !== color || $.nodeName(elem, "body")) break;

		} while (elem = elem.parentNode);

		if ("" === color) {

			if ($.support.opacity) {
				color = "transparent";
			} else if ("backgroundColor" === attr) {
				color = "white";
			} else {
				color = "black";
			}
		}
		return new xColor(color);
	}

	/**
     * @constructor
     */
	function xColorMix() {

		this.test = function (col) {

			var c = new xColor(col);

			if (c.success) {
				return c;
			}
			return null;
		}

		this.red = function (col) {

			var c = new xColor(col);

			if (c.success) {
				c.g = 0xff;
				c.b = 0xff;
				return c;
			}
			return null;
		}

		this.blue = function (col) {

			var c = new xColor(col);

			if (c.success) {
				c.r = 0xff;
				c.g = 0xff;
				return c;
			}
			return null;
		}

		this.green = function (col) {

			var c = new xColor(col);

			if (c.success) {
				c.r = 0xff;
				c.b = 0xff;
				return c;
			}
			return null;
		}

		this.sepia = function(col) {

			var c = new xColor(col);

			// Microsoft's sepia function http://msdn.microsoft.com/en-us/magazine/cc163866.aspx
			if (c.success) {

				var r = c.r, g = c.g, b = c.b;

				c.r = Math.round(r * 0.393 + g * 0.769 + b * 0.189);
				c.g = Math.round(r * 0.349 + g * 0.686 + b * 0.168);
				c.b = Math.round(r * 0.272 + g * 0.534 + b * 0.131);

				return c;
			}
			return null;
		}

		this.random = function () {

			return new xColor([
				(255 * Math.random())|0,
				(255 * Math.random())|0,
				(255 * Math.random())|0
				]);
		}

		this.inverse = function (col) {

			var c = new xColor(col);

			if (c.success) {
				c.r^= 0xff;
				c.g^= 0xff;
				c.b^= 0xff;
				return c;
			}
			return null;
		}

		this.opacity = function (x, y, o) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {

				if (o > 1) {
					o/= 100;
				}

				o = Math.max(o - 1 + b.a, 0);

				a.r = Math.round((b.r - a.r) * o + a.r);
				a.g = Math.round((b.g - a.g) * o + a.g);
				a.b = Math.round((b.b - a.b) * o + a.b);

				return a;
			}
			return null;
		}

		this.greyfilter = function (col, formula) {

			var v, c = new xColor(col);

			if (c.success) {
				switch (formula) {
					case 1:
						// My own formula
						v = .35 + 13 * (c.r + c.g + c.b) / 60;
						break;
					case 2:
						// Sun's formula: (1 - avg) / (100 / 35) + avg)
						v = (13 * (c.r + c.g + c.b) + 5355) / 60;
						break;
					default:
						v = c.r * .3 + c.g * .59 + c.b * .11;
				}
				c.r = c.g = c.b = Math.min(v|0, 255);

				return c;
			}
			return null;
		}

		this.webround = function (col) {

			var c = new xColor(col);

			if (c.success) {
				if ((c.r+= 0x33 - c.r % 0x33) > 0xff) c.r = 0xff;
				if ((c.g+= 0x33 - c.g % 0x33) > 0xff) c.g = 0xff;
				if ((c.b+= 0x33 - c.b % 0x33) > 0xff) c.b = 0xff;
				return c;
			}
			return null;
		}

		this.distance = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {
				// Approximation attempt of http://www.compuphase.com/cmetric.htm
				return Math.sqrt(3 * (b.r - a.r) * (b.r - a.r) + 4 * (b.g - a.g) * (b.g - a.g) + 2 * (b.b - a.b) * (b.b - a.b));
			}
			return null;
		}

		this.readable = function (bg, col) {

			var a = new xColor(col);
			var b = new xColor(bg);

			if (a.success & b.success) {
				return (
					(b.r - a.r) * (b.r - a.r) +
					(b.g - a.g) * (b.g - a.g) +
					(b.b - a.b) * (b.b - a.b)) > 0x28A4;
			}
			return null;
		}

		this.combine = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {
				a.r^= b.r;
				a.g^= b.g;
				a.b^= b.b;
				return a;
			}
			return null;
		}

		this.breed = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			var mask = 0;

			if (a.success & b.success) {

				for (var i = 0; i < 6; ++i) {
					if (Math.random() < .5) {
						mask|= 0x0f << (i << 2);
					}
				}

				a.r = (a.r & ((mask >> 0x10) & 0xff)) | (b.r & (((mask >> 0x10) & 0xff) ^ 0xff));
				a.g = (a.g & ((mask >> 0x08) & 0xff)) | (b.g & (((mask >> 0x08) & 0xff) ^ 0xff));
				a.b = (a.b & ((mask >> 0x00) & 0xff)) | (b.b & (((mask >> 0x00) & 0xff) ^ 0xff));
				return a;
			}
			return null;
		}

		this.additive = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {

				if ((a.r+= b.r) > 0xff) a.r = 0xff;
				if ((a.g+= b.g) > 0xff) a.g = 0xff;
				if ((a.b+= b.b) > 0xff) a.b = 0xff;

				return a;
			}
			return null;
		}

		this.subtractive = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {

				if ((a.r+= b.r - 0xff) < 0) a.r = 0;
				if ((a.g+= b.g - 0xff) < 0) a.g = 0;
				if ((a.b+= b.b - 0xff) < 0) a.b = 0;

				return a;
			}
			return null;
		}

		this.subtract = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {

				if ((a.r-= b.r) < 0) a.r = 0;
				if ((a.g-= b.g) < 0) a.g = 0;
				if ((a.b-= b.b) < 0) a.b = 0;

				return a;
			}
			return null;
		}

		this.multiply = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {
				a.r = (a.r / 255 * b.r)|0;
				a.g = (a.g / 255 * b.g)|0;
				a.b = (a.b / 255 * b.b)|0;
				return a;
			}
			return null;
		}

		this.average = function (x, y) {

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {
				a.r = (a.r + b.r) >> 1;
				a.g = (a.g + b.g) >> 1;
				a.b = (a.b + b.b) >> 1;
				return a;
			}
			return null;
		}

		this.triad = function (col) {

			var c = new xColor(col);

			if (c.success) {

				return [c,
				new xColor([c.b, c.r, c.g]),
				new xColor([c.g, c.b, c.r])];
			}
			return null;
		}

		this.tetrad = function (col) {

			var c = new xColor(col);

			if (c.success) {

				return [c,
				new xColor([c.b, c.r, c.b]),
				new xColor([c.b, c.g, c.r]),
				new xColor([c.r, c.b, c.r])];
			}
			return null;
		}

		this.gradientlevel = function (x, y, level, deg) {

			if (level > deg) return null;

			var a = new xColor(x);
			var b = new xColor(y);

			if (a.success & b.success) {

				a.r = (a.r + ((b.r - a.r) / deg) * level)|0;
				a.g = (a.g + ((b.g - a.g) / deg) * level)|0;
				a.b = (a.b + ((b.b - a.b) / deg) * level)|0;

				return a;
			}
			return null;
		}

		this.gradientarray = function (arr, ndx, size) {

			if (ndx > size) return null;

			var e = (ndx * (arr.length - 1) / size)|0;
			var m = (ndx - size * e / (arr.length - 1)) / size;

			var a = new xColor(arr[e]);
			var b = new xColor(arr[e + 1]);

			if (a.success & b.success) {

				a.r = (a.r + arr.length * (b.r - a.r) * m)|0;
				a.g = (a.g + arr.length * (b.g - a.g) * m)|0;
				a.b = (a.b + arr.length * (b.b - a.b) * m)|0;

				return a;
			}
			return null;
		}

		this.nearestname = function (a) {

			a = new xColor(a);

			if (a.success) {
				return a.getName();
			}
			return null;
		}

		this.darken = function (col, by, shade) {

			if (by === void 0) {
				by = 1;
			} else if (by < 0) return this.lighten(col, -by, shade);

			if (shade === void 0) {
				shade = 32;
			}

			var c = new xColor(col);

			if (c.success) {
				if ((c.r-= shade * by) < 0) c.r = 0;
				if ((c.g-= shade * by) < 0) c.g = 0;
				if ((c.b-= shade * by) < 0) c.b = 0;
				return c;
			}
			return null;
		}

		this.lighten = function (col, by, shade) {

			if (by === void 0) {
				by = 1;
			} else if (by < 0) return this.darken(col, -by, shade);

			if (shade === void 0) {
				shade = 32;
			}

			var c = new xColor(col);

			if (c.success) {
				if ((c.r+= shade * by) > 0xff) c.r = 0xff;
				if ((c.g+= shade * by) > 0xff) c.g = 0xff;
				if ((c.b+= shade * by) > 0xff) c.b = 0xff;
				return c;
			}
			return null;
		}

		this.analogous = function (col, results, slices) {

			if (results === void 0) {
				results = 8;
			}

			if (slices === void 0) {
				slices = 30;
			}

			var c = new xColor(col);

			if (c.success) {

				var hsv = c.getHSV();
				var part = 360 / slices, ret = [ c ];

				for (hsv.h = ((hsv.h - (part * results >> 1)) + 720) % 360; --results; ) {
					hsv.h+= part;
					hsv.h%= 360;
					ret.push(new xColor(hsv));
				}
				return ret;
			}
			return null;
		}

		this.complementary = function(col) {

			var c = new xColor(col);

			if(c.success) {

				var hsl = c.getHSL();

				hsl.h = (hsl.h + 180) % 360;

				return new xColor(hsl);
			}
			return null;
		}

		this.splitcomplement = function (col) {

			var c = new xColor(col);

			if (c.success) {

				var hsv = c.getHSV();
				var ret = [ c ];

				hsv.h+= 72;
				hsv.h%= 360;
				ret.push(new xColor(hsv));

				hsv.h+= 144;
				hsv.h%= 360;
				ret.push(new xColor(hsv));

				return ret;
			}
			return null;
		}

		this.monochromatic = function (col, results) {

			if (results === void 0) {
				results = 6;
			}

			var c = new xColor(col);

			if (c.success) {

				var hsv = c.getHSV();
				var ret = [ c ];

				while (--results) {
					hsv.v+= 20;
					hsv.v%= 100;
					ret.push(new xColor(hsv));
				}
				return ret;
			}
			return null;
		}
	}

	$.xcolor = new xColorMix();

	$.fn.isReadable = function () {

		var elem = this[0];
		var f = "";
		var b = "";

		do {

			if ("" === f && ("transparent" === (f = $.curCSS(elem, "color")) || "rgba(0, 0, 0, 0)" === f)) {
				f = "";
			}

			if ("" === b && ("transparent" === (b = $.curCSS(elem, "backgroundColor")) || "rgba(0, 0, 0, 0)" === b)) {
				b = "";
			}

			if ("" !== f && "" !== b || $.nodeName(elem, "body")) {
				break;
			}

		} while (elem = elem.parentNode);

		if ("" === f) {
			f = "black";
		}

		if ("" === b) {
			b = "white";
		}

		// todo: if alpha != 1, use opacity() to calculate correct color on certain element and it's parent
		return $.xcolor.readable(b, f);
	}

})(jQuery);