Keep small images in the CSS

Keep small images that can not be thrust in the sprites in data: image base64 in CSS - it saves a lot of requests to the web server.

Encode an image in base64 via online services like the service from DailyCoding (very convenient, nothing more).

Put the resulting string in the CSS file, replacing the "TYPE" on the MIME-type of your image - jpeg / png / gif or (! OMG) bmp and "CODE" to the line in base64:
.some_background {
background-image: url("data:image/ТИП;base64,КОД");
}

Now you can safely connect the desired item some_background style and enjoy two requests to the web server (html + css), instead of three (html + css + picture).

The embodiment with the images :

• images.html - 361 bytes
• images / images.css - 305 bytes
• images / test1.png - 1600 bytes
• images / test2.png - 1143 bytes
• Total - 3409 bytes

* When you click, the picture will increase

The embodiment with the base64 :

• base64.html - 361 bytes
• images / base64.css - 3991 bytes
• Total - 4352 bytes

* When you click, the picture will increase

An example of a finished tool Jammit :

Up (102 request, 73.23 KB transferred, 3.41 seconds):

* When you click, the picture will increase

After (2 request transmitted KB 153.88 0.94 seconds):

* When you click, the picture will increase

Pros:

• decrease in the number of requests to the web server;
• less clogging of the user cache;
• sometimes decrease in the effective image volume on large files.

Minuses:

• the complexity of the image updates;
• sometimes a slight increase in the effective image volume with small files.

It is not clear (it is not clear, it is plus or minus):

• Internet Explorer 5, 6 and 7 are added to the base64 friends, but in IE8 works fine. It can be turned on , but do not recommend it, it is better to use mhtml

It seems to me that the amount of increase in the CSS file rather than once a request to the web server, as the default browser opens an average of 8 parallennyh connections to the web server, and 50-70 images of all this is, and who likes to turn?

Use this method costs only after the approval of the design and layout, since this method to update the image a little longer than usual.

For automatic packaging images in base64 have an online service duris.ru , but you can use a PHP script with the regular season:
<?php
echo preg_replace('/images\/[-\w\/\.]*/ie','"data:image/".((substr("\\0",-4)==".png")?"png":"gif").";base64,".base64_encode(file_get_contents("\\0"))',file_get_contents('style.css'));
?>

It makes such a CSS file:

 * {
	 padding: 0;
	 margin: 0;
 }
 html {
	 display: table;
	 width: 100%;
	 height: 100%;
 }
 body {
	 margin: auto 0;
	 overflow-y: scroll;
	 background: hsl (0,0%, 30%) url (images / background.svg) no-repeat;

 }
 .px_sort_0 {background: url (images / px / arrow-090-small.png)}
 .px_sort_1 {background: url (images / px / arrow-270-small.png)} / * margin: 5px 0;  * /
 .px_status_0 {background: url (images / px / minus-circle-frame.png); cursor: pointer}
 .px_status_1 {background: url (images / px / plus-circle-frame.png); cursor: pointer}
 .px_delete {background: url (images / px / cross-circle-frame.png); cursor: pointer}
 .px_help {background: url (images / px / question-frame.png); cursor: help}
 .px_info {background: url (images / px / information-frame.png); cursor: help}
 .px_return {background: url (images / px / arrow-skip-180.png); cursor: pointer}
 .px_watch {background: url (images / px / eye.png); cursor: pointer}
 .px_home {background: url (images / px / home.png)}
 [Data-beforeAddContent]: before {
	 content: attr (data-beforeAddContent);
	 display: block;
	 color: red;
	 width: 100px;
	 height: 16px;
	 border: 10px solid black;
 }

such:

 * {
	 padding: 0;
	 margin: 0;
 }
 html {
	 display: table;
	 width: 100%;
	 height: 100%;
 }
 body {
	 margin: auto 0;
	 overflow-y: scroll;
	 background: hsl (0,0%, 30%) url (data: image / gif; base64, PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPg0KCTxkZWZzPg0KCQk8cmFkaWFsR3JhZGllbnQgaWQ9InN1biIgY3g9IjUwJSIgY3k9IjUwJSIgcj0iNDUlIj4NCgkJCTxzdG9wIG9mZnNldD0iMCIgc3R5bGU9InN0b3AtY29sb3I6aHNsKDIxMCwxMDAlLDUwJSk7Ii8 + DQoJCQk8c3RvcCBvZmZzZXQ9IjEiIHN0eWxlPSJzdG9wLWNvbG9yOmhzbGEoMjEwLDEwMCUsNTAlLDApOyIvPg0KCQk8L3JhZGlhbEdyYWRpZW50Pg0KCTwvZGVmcz4NCgk8Y2lyY2xlIGN4PSI1MCUiIGN5PSIxNTBweCIgcj0iNzAwIiBzdHJva2UtZGFzaGFycmF5PSIxMDAiIHN0cm9rZT0idXJsKCNzdW4pIiBmaWxsPSJub25lIiBzdHJva2Utd2lkdGg9IjE0MDAiLz4NCjwvc3ZnPg ==) no-repeat;
 }
 .px_sort_0 {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAQ5JREFUeNpi / P // PwMlgImBQjDwBrCgCxj1XGfg4OZmYGNnj2FgZCxg + P9 / wq + fP5f8 + PqV4VyJJnEuAAZsDFBTQZS7mDGIBvGJ9gJI8c9v3wri / OWMX / xgYIj2kzMG8XEZgmHAz + / fbb9 / + cIwcdbps4 + / MzBMmX36LIgPEicqDP7 / + 5f +++ dPht + / fp55 + JWB4dvnTwysbOwmrOzsxAXi148fGUA2gsDrn0ADPn0GsoD4zjYgbYo1wFAw2FRxLQbuyCVndA7 + / w + iQXxsakGYBZuz / ry8pvH / 8YVbN / q + Mfx / e + vW35fXjIDC14D4B7paRvS8wMjICKJEgJgN2aEgHwHV / iFowNDLCwABBgC9qJ54WqC2JwAAAABJRU5ErkJggg ==)}
 .px_sort_1 {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAP5JREFUeNpi / P // PwMlgImBQjDwBrCgC9jPfQGmGRkZZwIJY4b // 88CwykdJHYwWYKwC37 / + gXGv37 + NI5yFzMG0TAxolzw4dUrBg5ubjD7DVDPj69fwWwILUfYgK + fPgJt / 8HAysbOcB + o5 / uXL0DbfzL8 / vmTuED8 / + // TKDiM98 + f2J4CDQARIP4IHGiDPjx7dvhb58 + M1jEOhs // MbAoBPpbAzig8SxOgGUEpExl1EEA6dzTQx35JIzOgf // wfRID5IHF0tOBVjCECAArNJagmL / 6wzIBrI1wFiNmwGMKLnBWD8gygBIOZCEv4DxG + Bav + i + 4Bx6GcmgAADAAiPsgkULyM8AAAAAElFTkSuQmCC)} / * margin: 5px 0;  * /
 .px_status_0 {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAvNJREFUeNp8k11MUmEYx / 9wQErIWaEoKjRtgqI1m9kszaGtqZu65SzXpJu2Ppbd1LzVzS7r0nnfRbKpiV554Y06q6m4RV8iRsgMooGBggJ6gJ73ZMtqdbYfh73n + f + fj / d9RW1tbRCJRBCLxcKbyCJKAKiIDPx4toivqVRqmfATSCaTYG8Jfj0yokqr1V7o6Oi4XlhYWM7zvPBBIpHA6XS + HRkZGXK73S9oaYGIs2 + cXq9nWZn4cktLS5fJZHrI22wq3 / AwvgwOIjA2hrDTCYVcrqq / dvUSVco5HA4mdhMJTqfTsVJqWltbu4xG4w1XXx + kc3PQUlZtbi7ylEootrawOTsLn3UJ5aau0xzH8WTiZybiRCKh0mg0tQ0N9SZnXy9yKDhHpcL29jYCgYDAzs4OVLSm3NjAWn8 / 6urqTHl5ebVMywwM7e1XOj9PTSHD44WIBuP1ehEMBn / D5 / NBxAblWoN / ZhrNzU2dTCuhH3VBQYHB8WwIJxQKeDweYXB7u7tC5h2qZJf + / xyoOj8fWLQi985tA9Myg8xwOIKozQY + KwvVMzNCBaFQCNQr5HI5FGSclpYmGExXVCBFsdFoDEwrIWfWBnja1 + jmJux2u5BNKpX + JRa2jaqJUaygIS0zCHOcBFJDGWLWRbiNRvzvSSczFguImUGYZfeurn60KyqrEIzFoJHJoGa9 / oMotZV + 5ixcrjU70zKDN2az2aKsqUO87BQ2KeAIHWsFBf9JmNpKUqKj1TWYmLBYmJbLzs6OBIPfpIDo8MV7D0o / vXsD / 7obclauUCgJiVVi + 9x5lDx6gvHx0efz8y8tdABfc / sXw7O8 / F5MsxE39vTqcbIYbk6KJc86HBIp + PpGqG / eRfGt + zCbn46Pjg5ZotHoJJ0PXrSf5JBMJjtGEzfqdKVV3d09TZWV1UUHh2e1vnIODDyeXFn5sBCJRKbj8fgGLceYAUdkEsdZq7R9mXT7iujSZB28zlSln6bu3NvbC7FuiAAR + i7AAKjye47FnCxuAAAAAElFTkSuQmCC); cursor: pointer}
 .px_status_1 {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAw5JREFUeNpMk01ME1EUhU9npqC1MVWEKrUQMVqQIC6ABBVIRYwYgURCokhduiKaaIwLja5cuQTcaWJi6AK0EKJEF8QQ0IAoUQIF2vKjIjTlp1BoO + 209d5BkJd8M3fezDn3vXfnampqaqDRaCAIgnonUokcAEZiLzbHGuFNJBJOwkcgHo + D7xL + j2SiKDMz80xdXV19VlZWnqIo6gtJkuDxeEba2tpaZ2dn + 2lqkJD5nZidnc1ZWXyhqqqqwWaz3e2XvxjtCw40zb9Am68L42suSDrJaCu / dp5WKk5OTrJ4loiJFouFl3K2urq6wWq13rjlfoghcQSJNAEpxgMwHNiHtV0bGAgMo2ehDzfzb + SLoqiQiY9NhFgsZszIyCgpLz9nu + 16gEiKAoPBgGAwiFeHm1RCodDmnEHGnanHKCsrs5lMphLWskFube2Vqx2 / 3sKvCyBBtktLS1hfX98 + HI6Xl5fV2Je0gnfeD7h0qfIqayW6pJvN5tznE3bsPqRTxTwi0QgWFxfV7M5xJ5TY5oEeTDPiG22x9FBxLmvZwBAIrGMkPIa0eDp6T3fC6 / WqWdlAq9Vi0PperQRT2FeBEc0YGYfBWolKxdtAjEq2Gl6D2 + 3erC99zOIt4RZRSUFMVlgM1rJBQBQl5IjH8T0ygZKx6u29Dxf1qKK8T6Xbc0k6LXKU4xQJbBDg7H9cLvf4qT35iPpDSDInAelQ2cq69cyIoQTydScxPT0zzlo2 + GG32x2VxoswBQ9CXE1A0AuAfocBxYw2oEGWnImKlAp0djocrBVoGfNTU + 7ejo43r1vynsH824j4aBDYiCHnazGODRSqMUbDODJnQlNuC7q6Ol9PT0 / 1slb81xhzTueoQP0hPLr8JDtV3g / MRPDTNQksyDgrF6M + 9Tru5z2E3f6yo7291UHl7V5ZWVE06mkAu5KTk / fr9XqrxXKiqLHxXmVBQfHRHY2GoaHPnubmp90TE2ODVOKPsizzDxNmA5EwECm8UyqdgfZ9lJomdWc70yp9tGRPNBr10 / MGsUj4 / wowAGfaiP6JIq6oAAAAAElFTkSuQmCC); cursor: pointer}
 .px_delete {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAxhJREFUeNpUU11IU2EYfrazOdGjqSm2hq6mbUszK + ZC0kT7IQUVCivCdRVdRF2Ft0p2l7ciCN1E4CjnzzCw6MaGEdkK1t907sdRWuLEn6nb3FF735OQffCc853zfs / z / n6K5uZmKBQKKJVK + U3IIxwFkE / IxN + 1Spjf2dnxEhYI2N7eBr9V + Lc0BKterz / T0tJyw2AwlEmSJBtUKhUCgcCX / v7 + vnA4 / JZ + TRASbBPMZjN7ZfLFxsbGVpvNdl / yePJ / P3 + OXz09iAwOIhoIQExPz6 + 7dvU8RSr4fD4mhwlbgslk4lCqmpqaWmtra2 + GOjqgHh + HnrzqtVrocnMhrq5ixeXCb / dHlNlaywVBkEhkgUWUW1tb + YWFhdXnztXZAh3tOECHT4yOYn19HZFIRMbGxgZOvnqF3MVFzHR2oqamxqbT6aqZywKlV65cvv7z9Wtkzs7B6HDIeR9 + 9gxLS0syeM + rxOmEJjSDhTdjaGiov85cFjhYUFBQuvp + AqIowlFcLB + Ox + PQPX2K7N5e + P1 + BINBPM7JQXRlBdEPbmi12lLmskBWNLqGmMcDKZlERno6nlDeXq8X8 / ​​PzshC312WxyG2KkwCfjcXiYK6KWsUikKivMTJuzM1BpD0VCmq1GikpKTIydnstbG4iTnaZQ1wlPaKCoIK69BjilG8aGY6Mjf1H5jk4OzUFkQWIzGcBJQtE2fvc9LR / UrRYsUThaveQv1ZU4FN5uSzAsNI8xCiytFMVCIVmJpnLAp / tdvtQblUNEseOw3Phgkz2EfkQ + WG4aVZ4vTAasU2Osiur4HQODTGXU / gVDPpdw8ODA + aHXVBYTuMlFWwfj / AueN9nMEBhrYTxwSOMjDgHQqGgi7nC7sWY9Xq / KSk95aW2dnNqsRFhQY2Psz / gU6kh1V2C4dYdGG / fg93 + ZNjh6BuKxWKjNCOSQq4GkKrRaHJoDmpNphLr3btt9RZLZdGeiwa3 + 12gu7trdGrq + 8Ta2tpYIpFY5K6ygEDIIuwniFTALCpYEV2avL3XmaJcoJADyWRymb7XCRHC8h8BBgBnQIpwMqgwawAAAABJRU5ErkJggg == ); cursor: pointer}
 .px_help {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA0pJREFUeNpMk11ME1kUx / + dj07ZDhVYbKGGJdDE8rHKC6trXMXqrsYHPkzkhVg1QeKLMSZ + PBhj4sM + 7cPug8bsgyb6QJMFLcZE44NRY8RQIVYb7JcNFi22QD + YTillpoP3jq46yW / uvXPv / 5wz95xj6O3thcFgAMMw + khYT2gFYCNY8PmRCKm1tbUgYYEATdNARw7fHoGwpbGxcXt / f / 9Ac3PzJlVV9Q2O4xCLxQIjIyPD8Xj8GfnkI5ToHtvS0kK9UvHe7u7uQ263 + / RkGDbvoxyu35Vw96mMaLwAzmi2DRzs + p1EykYiESqOE8qs0 + mkofzW09NzyOVyHb5wNYXQ3A8wVdajrs6G2tparGhmvCSaJy / SOHLA2cGyrEqMLFAjXLlctjU1Ne3Ys2e3 + / yVFASLHVVCBXZ1cDiwy / zl78z45z8OU9M8Lv6bwsXBLrff74 / Mzs6GWIfDsXVo6NjZ8YBijaYqYTQKSKclSJKEQDiFVFpBa7MF8YSMUHwV0rIGRsvjl81228SEb4pGYG9oaGgffpiAKFqRTKZ1n68iCsYLy9jZkcFP1Un4 / Uvw + XKw2614FS3j1776dqplyKsqn5fxZkZFuayhVFrF / GIWc8lFODZoGNi3DuFZBbefLIPlTSgUFf1ssbgCquVIqqgRqGoZcmEVmbxCcsyDE3hcOl6nR / PnzTSMFVX6fM3AkrN5fNaoDDWQZ1kOGxuAhKwSYeXXwug790EfTeKP36pFW8VGO50w1ECeep + LRt + GfnYIkHJZmCurYTSt03l6rUPn / zVFKclobzJiZuZdiGqpgdcej8f7x9Zakr4lrMhpCGYL + ArLV6d0TiktZ2ATZbg6q3HnjtdLtazVapWz2QwPGCpODbraHjwO4mMyA8FkwfWxBG7cy5FK5TH / PoAaPom / z7RjbGz01sTEuJcUoJ / 90hiJYHCaIf3BXDjZ0yIai8h8DCMwHcRS + gPa6iX0ddXgzNE2eDw3xkZHh73FYvF + NptVDfptkHsSBKFGFEWX09m25cSJs / s7O7c5vms0TE4 + j12 + / Nf9cPiNT5blx6VSiRbMCjXAEmiO6FWLPM9Xke5zkKZZ / 307kygXyK3HFEXJkXWBsEjIfRJgAII6jzFPmgnBAAAAAElFTkSuQmCC); cursor: help}
 .px_info {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAx5JREFUeNpMU1tIU2Ec / 23nnB1PZ9q0taUyLQVnruhFulAy1g0MvHQRQlwFPRUSQfaU9NRbQS9R9BL04h40pkhFUHSjwhK6iM5Lw0apU9vF7eh23NnW / zuG9cHvfN / 5 / t / v933 / m6GlpQUGgwFGo1GfCZsJ2wHYCUVYGwnCfD6fDxAWCcjlcmAzj39DJOyurKzc39bW1l5VVbVT0zTdwPM8gsHgSG9vb08oFHpHWx8JKrNxtbW17FZGPtrU1NTh9XqvDE / A7n8Zx4PBBAbfKpgKLYM3yfb2U + 7D9FJucnKSkUOELOd0OtlTDjQ3N3d4PJ4z3ffmMT67AQWFpdiyxQ6r1Yp0TsZn4rz + FMHZ485dHMdpJLLIRIzZbNZeUVHRcOjQQe + 1u / PgNthhsVgQja7g5gUZty7KiMdT + l5OsOL6 / Qjcbre3vLy8gXGZgOvkyROnH79ZQDpfSMEBwuEIFEVZDw5bLyxEdVtClfB8KIZjxxpPMy5PnzKHw + HqeTEDs9mmk9nIZDJwNvaD7OAFAdm / AS0rs + HrVBZ7W0tdjMsELMmkgrFpDVurclDVVSwll5FKpdFzw6Gntv16GJywlrDlVIbO5nQ74 / KUKuYGNC0LZXkV0WSGniqAFwWdLEkShIKidXfyBo7OJrHG0YxMIMlxPGocwIyiEbFw / bAkCeSWGSYp869acquoKWMLIxNIsttnp6a + j ++ oFpGIxyAXFsNUsFEHI8uyvP7PkFEVuLaZMD39Y5xxmcA3n8 / nP7LHCou4hLQSgSgXQZCKdDJzg60Z1JUo7GYFnvpiDAz4 / YzL2Ww2JRaLCoBBunzeU / fsVQBz4ShE8vvBwCwePomTiICFnyMoEcK43eVCf3 / fo6Gh934qwC / c38aYCQRGjZRnY / el5lqzKYXo3ARGRgNYivxCXWkCre4SdJ2rg8 / 3sL + vr8efSqWexmIxzaBHAygQRbGEfPY4nXW7OzuvNtbX76v + r9EwPPwheOfOzacTE2MfqbBeqarKCibNBDiChbCJYBYEwULdV01Ns / n / dqZXLlLUg1RgcVYOhN + E + B8BBgDs34KhINyuSwAAAABJRU5ErkJggg ==); cursor: help}
 .px_return {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAgtJREFUeNqkU71rFEEUfzs3u5cLnsGcUS5oFb + Cic1cJdhYKSIWKhauhYWugoT9E + y1kFSmsjlIo4UJIimsxEqvMQmoEI1I0HCKya2X / Zqb8b3J3uUiXpoM / PbNm3nf81tLaw27WXz0 / ltw + vrAzucNuG0D59zFuzMY3GsbrtXrQMmUUsAYA8uyjM7 / E9SVUvrdB2EQ9KyAbdO0dmWa + jcuDAuUQNhoNIzs2UK3c5ok / u1rx0QQKEjjGJSUpuQdZ7Dpu + l81x0XS0shDAxwEwDXu + 0F6hoKD + UUSkE6N85x7N + 7WRGLi43MUMGls0dE + 4FIOg6D6Zn37Vjiyvkx8fTlAnBynrh1WszPr3UypWkL6r8k / AlD2EAkSQqlwQIkUdSxWVldNzpLo + jRw8lXtZGRPSZTs6VhBXtfZQrWCw7E + / ZCa6gEjf4iJBQsw + dEG2kdmpijfl1sxb / unRPVLxLKxRz8eDZX + 3dg + PY1 / ​​HiYaQrtBentIVZxiPBk8rl / 0rsqlpsACQ4xx3mFCNN58y0CeR1C0YVdHoP8qcsAg0dNJYfvuOLb4ypVUNGfXmzN5vuCAdkTKJjVXWLuwCiwExdda / 9xw0T5 + kFF1T / syINcxsZ + REk3f5bV1ze / dWEoVFHgqI + zy3g + 3IWDiCLCoc4RLaqAYGeH + WzPeiQkWhKviWUJ7a3d / s5 / BRgACwsSLXcLHWcAAAAASUVORK5CYII =); cursor: pointer}
 .px_watch {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAdhJREFUeNrUk01LAlEUhu845QdRUxZBhIIWtFBso2AwRAVNLqKltHCb63b9A / 9AixZCELhyYdAmEyYCBcOlNa1CSQoxog / DMY3x9p5B27Zw1YGH8XrO + 55759wROOdsmLCwIWNoAwFh / ugfZQKsAQV4gbNf9woqIAeuQHOgGxgIMNix2Wx7iqIsxmKxWU3TxgqFgpWSsix3fT5fK5VKPedyuftOp5OE7oz60hHsYD8UCh3k83k5k8ksGYYx5XK5rK2WzgiIrPQf5aiGakljakVRjKDrZaPR6Oi6zglVVTlFMnnMZXmdK8o2x674IE + 1pCHtCFx2w + GwE9u3drtd81yJRAKdDXZ4eGSuFxb87PHxjg3yVEsaNNolg5NSqTTVbDaX7Agq8Hg8TFWLbGVl0xTY7TY2Our5NfhCQPNAWtFisdSr1WqvWCwawWBwRpKkcZyXadoN83qXmSQ50V1jGxurpnGlUqnH4 / FzvItTmoo5ApjQNMIOh2MrEon4o9Gov1arzZXL5XHKBwKBT7fbXU + n07fZbPa23W5f4BVd93o9TgYimATTMHHCbB5PN9ZSf0LmrsEHRDWInvB8w / oFvAv920iFDkBzF / 64fHTjvoFOxsL // 5h + BBgAwjbgRLl5ImwAAAAASUVORK5CYII =); cursor: pointer}
 .px_home {background: url (data: image / png; base64, iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8 / 9hAAAAAXNSR0IArs4c6QAAAhJJREFUOMuNUktrE2EUPTPzfdP5Mkk25uFIoNHUCNUSm4hUKFpSX1AQ3KhY7aqLLgRBEEHduHPhwp8hoi1F1JWIivGFNhstbS1NbdpGM3lNZjpjM8m4cSFpk3i2597DOfceoAUGjyWHzl8cu4QOIK2I5cwSkSSmAOAAOK3m + FaExFyS2 + OWeV5o62ALSyjlkidOj4xPXLmXOHxkOBDwdy3Mz72zLLOO / 0FQCfV / Sn / bVItlp1CqOLMLGWfk7Lnbf6N0jtAdiQ6XqwbVDRO6YWI1l0c4Ej3Z6l7NApxlmfVcvgDDNLFhWsipRRjmprxd3C0CvCCIQ8njo15JgK5VYOgaZJHH3ki4L7Jv / 6mOAkqo ++ iTxw8SXkYxOTWF69euIrjDi + fTj6hA6B2AE9sK6FpF8wcVk1IKxlxgjIEIAhhzgeP5CuAIbd / 42zILhNCsEo6e2RX0I9YfR / rrPHjRnX3xdHK00WisN5eq + bKWqv56H + vrRTikoEukqNVqeDj9rGrbtUUAjbYRJObi4vFDB4vlKmy7Dp7nUKpUwRHJv7sneqBtEwVC + Atj4 / dv3Lx1d2fAx8myjLrDYV0twe / zuRIDg5fXcj9X134spbd1ULdt8iH1 + vvLV28yVX0DgAOREjBJQlnTnFTq7ezy4ly52XVzPSUAoT2RnoF4PBHzeD3ulZVsYebL548FNT8DIAeg9u / CHw3cvN / OkfEDAAAAAElFTkSuQmCC)}
 [Data-beforeAddContent]: before {
	 content: attr (data-beforeAddContent);
	 display: block;
	 color: red;
	 width: 100px;
	 height: 16px;
	 border: 10px solid black;
 }

For Ruby on Rails has a lotion Jammit , which packs the image in CSS, as well as doing a bunch of other buns.