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-rw-r--r--ui/ui.datepicker.js3
1 files changed, 2 insertions, 1 deletions
diff --git a/ui/ui.datepicker.js b/ui/ui.datepicker.js
index a2fe6d1c6..2774d6a18 100644
--- a/ui/ui.datepicker.js
+++ b/ui/ui.datepicker.js
@@ -1430,7 +1430,8 @@ $.extend(Datepicker.prototype, {
this._addStatus(showStatus, inst.id, this._get(inst, 'currentStatus'), initStatus) + '>' +
currentText + '</a></div>' : '') + (isRTL ? prev : next) + '</div>' +
(prompt ? '<div class="' + this._promptClass + '"><span>' + prompt + '</span></div>' : '');
- var firstDay = this._get(inst, 'firstDay');
+ var firstDay = parseInt(this._get(inst, 'firstDay'));
+ firstDay = (isNaN(firstDay) ? 0 : firstDay);
var changeFirstDay = this._get(inst, 'changeFirstDay');
var dayNames = this._get(inst, 'dayNames');
var dayNamesShort = this._get(inst, 'dayNamesShort');