Datepicker: Proper handling of empty strings for dates.

diff --git a/ui/jquery.ui.datepicker.js b/ui/jquery.ui.datepicker.js
index 687ed2b052a4303eb97467aa503d1acade2501f8..ed2ab06009791a22fcaebae319a1f9943c47708a 100644 (file)
--- a/ui/jquery.ui.datepicker.js
+++ b/ui/jquery.ui.datepicker.js
@@ -1316,7 +1316,7 @@ $.extend(Datepicker.prototype, {
                        }
                        return new Date(year, month, day);
                };
-               var newDate = (date == null ? defaultDate : (typeof date == 'string' ? offsetString(date) :
+               var newDate = (date == null || date === '' ? defaultDate : (typeof date == 'string' ? offsetString(date) :
                        (typeof date == 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : new Date(date.getTime()))));
                newDate = (newDate && newDate.toString() == 'Invalid Date' ? defaultDate : newDate);
                if (newDate) {
@@ -1342,10 +1342,7 @@ $.extend(Datepicker.prototype, {
 
        /* Set the date(s) directly. */
        _setDate: function(inst, date, noChange) {
-               if ( !date ) {
-                       inst.input.val( "" );
-                       return;
-               }
+               var clear = !date;
                var origMonth = inst.selectedMonth;
                var origYear = inst.selectedYear;
                var newDate = this._restrictMinMax(inst, this._determineDate(inst, date, new Date()));
@@ -1356,7 +1353,7 @@ $.extend(Datepicker.prototype, {
                        this._notifyChange(inst);
                this._adjustInstDate(inst);
                if (inst.input) {
-                       inst.input.val(this._formatDate(inst));
+                       inst.input.val(clear ? '' : this._formatDate(inst));
                }
        },