code: function canvg(target, s, opts) {
    // no parameters
    if (target == null || s == null) {
      return;
    }
    opts = opts || {};
    // store class on canvas
    target.svg = svg = build();
    svg.opts = opts;
    var ctx = target.getContext('2d');
    svg.loadXmlDoc(ctx, svg.parseXml(s));
  
  }
docs: /*
  canvg.js - Javascript SVG parser and renderer on Canvas
  MIT Licensed
  Gabe Lerner (gabelerner@gmail.com)
  http://code.google.com/p/canvg/
  
  Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/