diff --git a/assets/invertcode.js b/assets/invertcode.js
index 996da8aab..2ff0b3ca3 100644
--- a/assets/invertcode.js
+++ b/assets/invertcode.js
@@ -1,10 +1,194 @@
 var Toggled;
 
+// before getting into regexps, try simple matches
+// and overwrite the input
+var simple_colors = {
+    
+    aliceblue: 'f0f8ff',
+    antiquewhite: 'faebd7',
+    aqua: '00ffff',
+    aquamarine: '7fffd4',
+    azure: 'f0ffff',
+    beige: 'f5f5dc',
+    bisque: 'ffe4c4',
+    black: '000000',
+    blanchedalmond: 'ffebcd',
+    blue: '0000ff',
+    blueviolet: '8a2be2',
+    brown: 'a52a2a',
+    burlywood: 'deb887',
+    cadetblue: '5f9ea0',
+    chartreuse: '7fff00',
+    chocolate: 'd2691e',
+    coral: 'ff7f50',
+    cornflowerblue: '6495ed',
+    cornsilk: 'fff8dc',
+    crimson: 'dc143c',
+    cyan: '00ffff',
+    darkblue: '00008b',
+    darkcyan: '008b8b',
+    darkgoldenrod: 'b8860b',
+    darkgray: 'a9a9a9',
+    darkgreen: '006400',
+    darkkhaki: 'bdb76b',
+    darkmagenta: '8b008b',
+    darkolivegreen: '556b2f',
+    darkorange: 'ff8c00',
+    darkorchid: '9932cc',
+    darkred: '8b0000',
+    darksalmon: 'e9967a',
+    darkseagreen: '8fbc8f',
+    darkslateblue: '483d8b',
+    darkslategray: '2f4f4f',
+    darkturquoise: '00ced1',
+    darkviolet: '9400d3',
+    deeppink: 'ff1493',
+    deepskyblue: '00bfff',
+    dimgray: '696969',
+    dodgerblue: '1e90ff',
+    feldspar: 'd19275',
+    firebrick: 'b22222',
+    floralwhite: 'fffaf0',
+    forestgreen: '228b22',
+    fuchsia: 'ff00ff',
+    gainsboro: 'dcdcdc',
+    ghostwhite: 'f8f8ff',
+    gold: 'ffd700',
+    goldenrod: 'daa520',
+    gray: '808080',
+    green: '008000',
+    greenyellow: 'adff2f',
+    honeydew: 'f0fff0',
+    hotpink: 'ff69b4',
+    indianred: 'cd5c5c',
+    indigo: '4b0082',
+    ivory: 'fffff0',
+    khaki: 'f0e68c',
+    lavender: 'e6e6fa',
+    lavenderblush: 'fff0f5',
+    lawngreen: '7cfc00',
+    lemonchiffon: 'fffacd',
+    lightblue: 'add8e6',
+    lightcoral: 'f08080',
+    lightcyan: 'e0ffff',
+    lightgoldenrodyellow: 'fafad2',
+    lightgrey: 'd3d3d3',
+    lightgreen: '90ee90',
+    lightpink: 'ffb6c1',
+    lightsalmon: 'ffa07a',
+    lightseagreen: '20b2aa',
+    lightskyblue: '87cefa',
+    lightslateblue: '8470ff',
+    lightslategray: '778899',
+    lightsteelblue: 'b0c4de',
+    lightyellow: 'ffffe0',
+    lime: '00ff00',
+    limegreen: '32cd32',
+    linen: 'faf0e6',
+    magenta: 'ff00ff',
+    maroon: '800000',
+    mediumaquamarine: '66cdaa',
+    mediumblue: '0000cd',
+    mediumorchid: 'ba55d3',
+    mediumpurple: '9370d8',
+    mediumseagreen: '3cb371',
+    mediumslateblue: '7b68ee',
+    mediumspringgreen: '00fa9a',
+    mediumturquoise: '48d1cc',
+    mediumvioletred: 'c71585',
+    midnightblue: '191970',
+    mintcream: 'f5fffa',
+    mistyrose: 'ffe4e1',
+    moccasin: 'ffe4b5',
+    navajowhite: 'ffdead',
+    navy: '000080',
+    oldlace: 'fdf5e6',
+    olive: '808000',
+    olivedrab: '6b8e23',
+    orange: 'ffa500',
+    orangered: 'ff4500',
+    orchid: 'da70d6',
+    palegoldenrod: 'eee8aa',
+    palegreen: '98fb98',
+    paleturquoise: 'afeeee',
+    palevioletred: 'd87093',
+    papayawhip: 'ffefd5',
+    peachpuff: 'ffdab9',
+    peru: 'cd853f',
+    pink: 'ffc0cb',
+    plum: 'dda0dd',
+    powderblue: 'b0e0e6',
+    purple: '800080',
+    red: 'ff0000',
+    rosybrown: 'bc8f8f',
+    royalblue: '4169e1',
+    saddlebrown: '8b4513',
+    salmon: 'fa8072',
+    sandybrown: 'f4a460',
+    seagreen: '2e8b57',
+    seashell: 'fff5ee',
+    sienna: 'a0522d',
+    silver: 'c0c0c0',
+    skyblue: '87ceeb',
+    slateblue: '6a5acd',
+    slategray: '708090',
+    snow: 'fffafa',
+    springgreen: '00ff7f',
+    steelblue: '4682b4',
+    tan: 'd2b48c',
+    teal: '008080',
+    thistle: 'd8bfd8',
+    tomato: 'ff6347',
+    turquoise: '40e0d0',
+    violet: 'ee82ee',
+    violetred: 'd02090',
+    wheat: 'f5deb3',
+    white: 'ffffff',
+    whitesmoke: 'f5f5f5',
+    yellow: 'ffff00',
+    yellowgreen: '9acd32'
+};
+
+var colorCache = new Object();
+var rgbCache = new Object();
+
+// array of color definition objects
+var color_defs = [{
+    re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
+    example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
+    process: function (bits) {
+        return [
+            parseInt(bits[1]),
+            parseInt(bits[2]),
+            parseInt(bits[3])
+        ];
+    }
+}, {
+    re: /^(\w{2})(\w{2})(\w{2})$/,
+    example: ['#00ff00', '336699'],
+    process: function (bits) {
+        return [
+            parseInt(bits[1], 16),
+            parseInt(bits[2], 16),
+            parseInt(bits[3], 16)
+        ];
+    }
+}, {
+    re: /^(\w{1})(\w{1})(\w{1})$/,
+    example: ['#fb0', 'f0f'],
+    process: function (bits) {
+        return [
+            parseInt(bits[1] + bits[1], 16),
+            parseInt(bits[2] + bits[2], 16),
+            parseInt(bits[3] + bits[3], 16)
+        ];
+    }
+}];
+
+var colorProperties = ['color', 'background-color', 'background'];
+
 function initCss() {
-    var colorProperties = ['color', 'background-color', 'background'];
-
     $('*').each(function () {
-
         for (var prop in colorProperties) {
             prop = colorProperties[prop];
             if (($(this).css(prop) === 'rgba(0, 0, 0, 0)') || ($(this).css(prop) === 'transparent')) {
@@ -16,38 +200,41 @@ function initCss() {
                     $(this).css('color', 'rgb(0, 0, 0)');
 
             }
-
         }
     });
 }
 
 function invertColors() {
-
     //First init for other elements
     if (typeof Toggled === 'undefined') {
         initCss();
         Toggled = true;
     }
 
-
-    var colorProperties = ['color', 'background-color', 'background'];
+    var color;
+    var prop;
+    var cssProp;
 
     $('*').each(function () {
-        var color = null;
-        for (var prop in colorProperties) {
+        for (prop in colorProperties) {
             prop = colorProperties[prop];
-            if (!$(this).css(prop)) continue;
-            color = new RGBColor($(this).css(prop));
-            if (color.ok) {
-                $(this).css(prop, 'rgb(' + (255 - color.r) + ',' + (255 - color.g) + ',' + (255 - color.b) + ')');
-            }
-            color = null;
-        }
+            if ($(this).css(prop)) {
+		cssProp = $(this).css(prop);
+		if (colorCache[cssProp] != undefined) {
+		    $(this).css(prop, colorCache[cssProp]);
+		} else {
+		    color = new RGBColor(cssProp);
+		    if (color.ok) {
+			$(this).css(prop, 'rgb(' + (255 - color.r) + ',' + (255 - color.g) + ',' + (255 - color.b) + ')');
+		    }
+		    colorCache[cssProp] = $(this).css(prop);
+		}
+	    }
+	}
     });
 
 }
 
-
 /**
  * A class to parse color values
  * @author Stoyan Stefanov <sstoo@gmail.com>
@@ -67,154 +254,6 @@ function RGBColor(color_string) {
     color_string = color_string.replace(/ /g, '');
     color_string = color_string.toLowerCase();
 
-    // before getting into regexps, try simple matches
-    // and overwrite the input
-    var simple_colors = {
-
-        aliceblue: 'f0f8ff',
-        antiquewhite: 'faebd7',
-        aqua: '00ffff',
-        aquamarine: '7fffd4',
-        azure: 'f0ffff',
-        beige: 'f5f5dc',
-        bisque: 'ffe4c4',
-        black: '000000',
-        blanchedalmond: 'ffebcd',
-        blue: '0000ff',
-        blueviolet: '8a2be2',
-        brown: 'a52a2a',
-        burlywood: 'deb887',
-        cadetblue: '5f9ea0',
-        chartreuse: '7fff00',
-        chocolate: 'd2691e',
-        coral: 'ff7f50',
-        cornflowerblue: '6495ed',
-        cornsilk: 'fff8dc',
-        crimson: 'dc143c',
-        cyan: '00ffff',
-        darkblue: '00008b',
-        darkcyan: '008b8b',
-        darkgoldenrod: 'b8860b',
-        darkgray: 'a9a9a9',
-        darkgreen: '006400',
-        darkkhaki: 'bdb76b',
-        darkmagenta: '8b008b',
-        darkolivegreen: '556b2f',
-        darkorange: 'ff8c00',
-        darkorchid: '9932cc',
-        darkred: '8b0000',
-        darksalmon: 'e9967a',
-        darkseagreen: '8fbc8f',
-        darkslateblue: '483d8b',
-        darkslategray: '2f4f4f',
-        darkturquoise: '00ced1',
-        darkviolet: '9400d3',
-        deeppink: 'ff1493',
-        deepskyblue: '00bfff',
-        dimgray: '696969',
-        dodgerblue: '1e90ff',
-        feldspar: 'd19275',
-        firebrick: 'b22222',
-        floralwhite: 'fffaf0',
-        forestgreen: '228b22',
-        fuchsia: 'ff00ff',
-        gainsboro: 'dcdcdc',
-        ghostwhite: 'f8f8ff',
-        gold: 'ffd700',
-        goldenrod: 'daa520',
-        gray: '808080',
-        green: '008000',
-        greenyellow: 'adff2f',
-        honeydew: 'f0fff0',
-        hotpink: 'ff69b4',
-        indianred: 'cd5c5c',
-        indigo: '4b0082',
-        ivory: 'fffff0',
-        khaki: 'f0e68c',
-        lavender: 'e6e6fa',
-        lavenderblush: 'fff0f5',
-        lawngreen: '7cfc00',
-        lemonchiffon: 'fffacd',
-        lightblue: 'add8e6',
-        lightcoral: 'f08080',
-        lightcyan: 'e0ffff',
-        lightgoldenrodyellow: 'fafad2',
-        lightgrey: 'd3d3d3',
-        lightgreen: '90ee90',
-        lightpink: 'ffb6c1',
-        lightsalmon: 'ffa07a',
-        lightseagreen: '20b2aa',
-        lightskyblue: '87cefa',
-        lightslateblue: '8470ff',
-        lightslategray: '778899',
-        lightsteelblue: 'b0c4de',
-        lightyellow: 'ffffe0',
-        lime: '00ff00',
-        limegreen: '32cd32',
-        linen: 'faf0e6',
-        magenta: 'ff00ff',
-        maroon: '800000',
-        mediumaquamarine: '66cdaa',
-        mediumblue: '0000cd',
-        mediumorchid: 'ba55d3',
-        mediumpurple: '9370d8',
-        mediumseagreen: '3cb371',
-        mediumslateblue: '7b68ee',
-        mediumspringgreen: '00fa9a',
-        mediumturquoise: '48d1cc',
-        mediumvioletred: 'c71585',
-        midnightblue: '191970',
-        mintcream: 'f5fffa',
-        mistyrose: 'ffe4e1',
-        moccasin: 'ffe4b5',
-        navajowhite: 'ffdead',
-        navy: '000080',
-        oldlace: 'fdf5e6',
-        olive: '808000',
-        olivedrab: '6b8e23',
-        orange: 'ffa500',
-        orangered: 'ff4500',
-        orchid: 'da70d6',
-        palegoldenrod: 'eee8aa',
-        palegreen: '98fb98',
-        paleturquoise: 'afeeee',
-        palevioletred: 'd87093',
-        papayawhip: 'ffefd5',
-        peachpuff: 'ffdab9',
-        peru: 'cd853f',
-        pink: 'ffc0cb',
-        plum: 'dda0dd',
-        powderblue: 'b0e0e6',
-        purple: '800080',
-        red: 'ff0000',
-        rosybrown: 'bc8f8f',
-        royalblue: '4169e1',
-        saddlebrown: '8b4513',
-        salmon: 'fa8072',
-        sandybrown: 'f4a460',
-        seagreen: '2e8b57',
-        seashell: 'fff5ee',
-        sienna: 'a0522d',
-        silver: 'c0c0c0',
-        skyblue: '87ceeb',
-        slateblue: '6a5acd',
-        slategray: '708090',
-        snow: 'fffafa',
-        springgreen: '00ff7f',
-        steelblue: '4682b4',
-        tan: 'd2b48c',
-        teal: '008080',
-        thistle: 'd8bfd8',
-        tomato: 'ff6347',
-        turquoise: '40e0d0',
-        violet: 'ee82ee',
-        violetred: 'd02090',
-        wheat: 'f5deb3',
-        white: 'ffffff',
-        whitesmoke: 'f5f5f5',
-        yellow: 'ffff00',
-        yellowgreen: '9acd32'
-    };
     for (var key in simple_colors) {
         if (color_string == key) {
             color_string = simple_colors[key];
@@ -222,39 +261,6 @@ function RGBColor(color_string) {
     }
     // emd of simple type-in colors
 
-    // array of color definition objects
-    var color_defs = [{
-        re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
-        example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
-        process: function (bits) {
-            return [
-                parseInt(bits[1]),
-                parseInt(bits[2]),
-                parseInt(bits[3])
-            ];
-        }
-    }, {
-        re: /^(\w{2})(\w{2})(\w{2})$/,
-        example: ['#00ff00', '336699'],
-        process: function (bits) {
-            return [
-                parseInt(bits[1], 16),
-                parseInt(bits[2], 16),
-                parseInt(bits[3], 16)
-            ];
-        }
-    }, {
-        re: /^(\w{1})(\w{1})(\w{1})$/,
-        example: ['#fb0', 'f0f'],
-        process: function (bits) {
-            return [
-                parseInt(bits[1] + bits[1], 16),
-                parseInt(bits[2] + bits[2], 16),
-                parseInt(bits[3] + bits[3], 16)
-            ];
-        }
-    }];
-
     // search through the definitions to find a match
     for (var i = 0; i < color_defs.length; i++) {
         var re = color_defs[i].re;