VectorCanvas.prototype.setSize = function (width, height) {
  if (this.mode === 'svg') {
    this.canvas.setAttribute('width', width);
    this.canvas.setAttribute('height', height);
  } else {
    this.canvas.style.width = width + 'px';
    this.canvas.style.height = height + 'px';
    this.canvas.coordsize = width + ' ' + height;
    this.canvas.coordorigin = '0 0';
    if (this.rootGroup) {
      var paths = this.rootGroup.getElementsByTagName('shape');
      for (var i = 0, l = paths.length; i < l; i++) {
        paths[i].coordsize = width + ' ' + height;
        paths[i].style.width = width + 'px';
        paths[i].style.height = height + 'px';
      }
      this.rootGroup.coordsize = width + ' ' + height;
      this.rootGroup.style.width = width + 'px';
      this.rootGroup.style.height = height + 'px';
    }
  }
  this.width = width;
  this.height = height;
};