this.RegisterCustomValidationMethod(MAXALLOWEDDATE_METHODNAME, “function(value, element, param) { var newDate = $(element).datepicker(‘getDate’); var checkDate = $.glob.format(newDate, ‘yyyyMMdd’); return this.optional(element) || parseInt(param) > parseInt(checkDate);});”);
this.RegisterCustomValidationMethod(MINALLOWEDDATE_METHODNAME, “function(value, element, param) { var newDate = $(element).datepicker(‘getDate’); var checkDate = $.glob.format(newDate, ‘yyyyMMdd’); return this.optional(element) || parseInt(param) < parseInt(checkDate);});”);
Really helpful