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function strToDate(str) {
 var re=/^(\d{4})\/(\d{1,2})\/(\d{1,2}) (\d{1,2}):(\d{1,2})$/g
 if(re.test(str)) {
  if (RegExp.$2<1 || RegExp.$2>12) {
   return false;
  }
  if (RegExp.$3<1 || RegExp.$3>31) {
   return false;
  }  
  if (RegExp.$4<0 || RegExp.$4>60) {
   return false;
  }
  if (RegExp.$5<0 || RegExp.$5>60) {
   return false;
  }
  return new Date(RegExp.$1,RegExp.$2,RegExp.$3,RegExp.$4,RegExp.$5);
 } else {
  return false;
 }
}


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