The function _canAdjustMonth is't correct.

Example

I want to show 3 months ( numberOfMonths: 3 )

My minimum date is 2008-01-26 ( minDate: new Date(2008, 1 - 1, 26) )

My maximum date is 2008-04-27 ( minDate: new Date(2008, 4 - 1, 27) )

hideIfNoPrevNext is set to true

Because of the bug in the function _canAdjustMonth I can press the next button until juni 2008.

The solution is also to calculate the numberOfMonths.

Solution

OLD FUNCTOIN

_canAdjustMonth: function(offset) {            
   var date = new Date(this._selectedYear, this._selectedMonth + offset, 1);
   if (offset < 0) {
      date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
   }
   return this._isInRange(date);
},

NEW FUNCTION

_canAdjustMonth: function(offset) {            
   var month = offset > 0 ? 
      this._selectedMonth + offset + this._get('numberOfMonths') - 1 :
      this._selectedMonth + offset;
   var date = new Date(this._selectedYear, month, 1);
   if (offset < 0) {
      date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
   }
   return this._isInRange(date);
},

Emiel Roelofsen