JavaScript validates the legality of a given date--an upgraded version

javascript| Date

I used to send a "JavaScript validation of the legality of a given date", when the code could only validate dates and not validate time. A new upgraded version can validate a mixed string of date and time.

The code is as follows:

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Verify that the given date is legitimate and that the parameter format requires: yyyy-mm-dd[HH:MI:SS] can correct the expression according to the situation
function IsDate (odatetime)
{
Validation of date formats requires a 2000-2,099 format of yyyy-mm-dd[Hh:mi:ss] and can be converted to the correct date correctly
var pat_hd=/^ (20\d{2}-(0[1-9]{1}) | ( 1[0-2]{1})-((0[1-9]{1}) | ( [1-2] {1} [0-9] {1}) | (3[0-1]{1})) {1} (\s\d{2}:\d{2}:\d{2})? $/;
try{
if (!pat_hd.test (odatetime)) throw "date illegal!" ";
var arr_dt=odatetime.split ("");
if (arr_dt[0]== ') throw ' date is illegal! ";
var odate=arr_dt[0];
var arr_hd=odate.split ("-");
var datetmp;
datetmp= New Date (Arr_hd[0],parsefloat (arr_hd[1)) -1,parsefloat (arr_hd[2));
if (Datetmp.getfullyear ()!=parsefloat (arr_hd[0)) | | Datetmp.getmonth ()!=parsefloat (arr_hd[1])-1 | | dateTmp.getDate ( )!=parsefloat (arr_hd[2]) throw "date illegal! ";
if (arr_dt[1] && arr_dt[1]!= ')
{
var otime=arr_dt[1];
var arr_ht=otime.split (":");
Datetmp.sethours (arr_ht[0],arr_ht[1],arr_ht[2]);
if (Datetmp.gethours ()!=parsefloat (arr_ht[0)) | | datetmp.getminutes ()!=parsefloat (arr_ht[1)) | | Datetmp.getseconds ( )!=parsefloat (arr_ht[2]) throw "date illegal! ";
}
}
catch (ex)
{
if (ex.description)
{return false;}
Else
{return false;}
}
return true;
}

Call:

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Alert (IsDate ("2004-12-12 23:34:23"));

Alert (IsDate ("2004-12-12"));