<!doctype html>
<html>
<head>
  <style>
  @font-face {
    font-family: 'coool';
    font-style: normal;
    font-weight: 400;
    src: url(styles/fonts/coool.woff) format('woff');
    src:url("styles/fonts/coool.eot?#iefix") format("embedded-opentype"),url("styles/fonts/coool.woff") format("woff"),url("styles/fonts/coool.ttf") format("truetype"),url("styles/fonts/coool.svg#coool") format("svg")
  }
  
  .something {
    /* filter src should NOT be converted, as it's supposed to be relative to the document 