+ * Get the x-labels for a given axis.
+ *
+ * You can specify a parent if more than one graph is in the document.
+ */
+Util.getXLabels = function(parent) {
+ parent = parent || document;
+ var x_labels = parent.getElementsByClassName("dygraph-axis-label-x");
+ var ary = [];
+ for (var i = 0; i < x_labels.length; i++) {
+ ary.push(x_labels[i].innerHTML);
+ }
+ return ary;
+}
+
+/**