catch NaN dates like new Date("2009/10/00") in parseArray_

diff --git a/dygraph.js b/dygraph.js
index ba2f31e..6b1a99c 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -1807,7 +1807,8 @@ Dygraph.prototype.parseArray_ = function(data) {
         return null;
       }
       if (parsedData[i][0] == null
-          || typeof(parsedData[i][0].getTime) != 'function') {
+          || typeof(parsedData[i][0].getTime) != 'function'
+          || isNaN(parsedData[i][0].getTime())) {
         this.error("x value in row " << (1 + i) << " is not a Date");
         return null;
       }