var pointSize = this.dygraph_.attr_("pointSize", setName);
var prevX = null, prevY = null;
var drawPoints = this.dygraph_.attr_("drawPoints", setName);
var pointSize = this.dygraph_.attr_("pointSize", setName);
var prevX = null, prevY = null;
var drawPoints = this.dygraph_.attr_("drawPoints", setName);