Date Format Verification

Description: input a date of the string type, for example, 2012-04-13 or 2012/04/13. If the verification succeeds, true is returned. Otherwise, false is returned.

 

var isDateFormat = function(_datestr){　　 var dateStr = _datestr.match(/^(\d{4})-(\d{2})-(\d{2})$/);    var   intYear;     var   intMonth;     var   intDay;     var   boolLeapYear;     if(dateStr != null){     intYear =  parseInt(dateStr[0],10);        intMonth = parseInt(dateStr[2],10);         intDay = parseInt(dateStr[3],10);     if(dateStr.length == 4){     if(!(intMonth > 12) && !(intMonth < 1)){     if(intMonth==1||intMonth==3||intMonth==5||intMonth==7||intMonth==8||intMonth==10||intMonth==12){     if(intDay>=1&&intDay<=31){     return true;     } else {     return false;     }     } else {         if(intMonth==4||intMonth==6||intMonth==9||intMonth==11){         if(intDay>=1 && intDay<=30){         return true;         } else {         return false;         }         } else {             if(intMonth==2){         if(intDay < 1){         return false;         } else {         var boolLeapYear = false;         if(intYear%4 == 0 && intYear%100 != 0){         boolLeapYear = true;         }         if(boolLeapYear){         if(intDay > 29){         return false;         } else {         return true;         }         } else {         if(intDay > 28){         return false;         } else {         return true;         }         }         }             }         }     }     }     }else {     returnfalse;        }    } else {    returnfalse;    }};