Try parsing the date with something like:
function dateParser (mydate) {
if (mydate !== undefined) {
var a = mydate.split("-");
var yearMy = a[0];
var monthMy = a[1];
var dayMy = a[2];
var finalDate = new Date(yearMy, monthMy, dayMy);
var finalDate = finalDate.getTime();
return finalDate;