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date validation

/ Published in: JavaScript
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  1. (function(scope){
  2. 	scope = scope || window;
  3. 	var bissexto = function(year){
  4. 		return year%4==0 && year%100!=0 || year%400==0;
  5. 	};
  6. 	var dayByMonth = [null,31,28,31,30,31,30,31,31,30,31,30,31];
  7. 	scope.validDate = function(year, month, day){
  8. 		return bissexto(year) && month==2 ? day<=29 : day <= dayByMonth[month];
  9. 	}
  10. })(window);

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