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isDateValid - Validate a date in javascript

/ Published in: JavaScript
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A simple JS script to validate a date. It returns a boolean type (true | false)

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  1. /**
  2.  * Check if a date is valid
  3.  * @return bool
  4.  * @author Mardix
  5.  * @since: June 30 2009
  6.  */
  7. isDateValid = function(year,month,date){
  8.  
  9.     if(year && month && date){
  10.       if(month==2){
  11.         if((year%4 == 0) && date>29)
  12.            return false
  13.         else if((year%4!=0) && date > 28)
  14.            return false;
  15.       }
  16.  
  17.       if((month!=2 && month!=8) && ((month%2 != 1) && date>30))
  18.           return false;
  19.       else
  20.           return true;
  21.     }
  22.  
  23.     else
  24.         return false;
  25. }

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