Javascript date Verification

// Get the array date_array by the page element date_string (YYYY-MM_DD format)
// Input parameter: date_string: Date string; marker: Separator in date_string. If not, it is "";
// Return value: array: date_array
// Array element date_array.year = yyyy; date_array.month = mm; date_array.day = dd; date_array.datestring = yyyymmdd
Function date_get (date_string, marker)
{
VaR date_array = new array ()
If (date_string.length! = 0)
{
If (marker! = "") // If the input string has a separator
{
VaR year = date_string.substr (0, 4 );
VaR month = date_string.substr (5, 2 );
VaR day = date_string.substr (8, 2 );
}
Else // If the input string does not have a separator
{
VaR year = date_string.substr (0, 4 );
VaR month = date_string.substr (4, 2 );
VaR day = date_string.substr (6, 2 );
}

Date_array.year = year;
Date_array.month = month;
Date_array.day = Day;
Date_array.datestring = year + month + day + "";
Return date_array;
}

Date_array.year = "";
Date_array.month = "";
Date_array.day = "";
Date_array.datestring = "";

Return date_array;
}

// Year must be greater than 1900; month must be between 1 and 12; day must be between 1 and 31
// Enter the name of the control label to be displayed in the year, month, day, and error message.
// Return value: array: check_result
// Array element check_result.status: True/false: Check successful/failed;
// Array element check_result.message: ""/empty string of error message (when verification is successful)/error message (when verification fails );
Function date_check (date_array, field_name)
{
VaR check_result = new array ();

// Obtain the number. (Page)
VaR year = date_array.year;
VaR month = date_array.month;
VaR day = date_array.day;
VaR hour = date_array.hour;
VaR minute = date_array.minute;
VaR second = date_array.second;

// The year must be YYYY (use a regular expression to determine if it is a number)
VaR err_message = 'date must conform to the YYYY-MM-DD format, and the year must consist of four digits in the yyyy format! ';
// Var year_patten =/^ [0-9] {4} $/I;
VaR year_patten =/^/d + $/I;
VaR matcharray = year. Match (year_patten );
If (Year. length! = 0 & matcharray = NULL)
{
Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}

// The month must be mm (use a regular expression to determine if it is a number)
VaR err_message = 'date must conform to the YYYY-MM-DD format, and the month must consist of two digits in mm format! ';
// Var month_patten =/^ [0-9] {2, 2} $/I;
VaR month_patten =/^/d + $/I;
VaR matcharray = month. Match (month_patten );
If (month. length! = 0 & matcharray = NULL)
{
Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
// The date must be dd (use a regular expression to determine whether it is a number)
VaR err_message = 'date must conform to the YYYY-MM-DD format, and date must consist of two digits in the DD format! ';
// Var day_patten =/^ [0-9] {2, 2} $/I;
VaR day_patten =/^/d + $/I;
VaR matcharray = day. Match (day_patten );
If (day. length! = 0 & matcharray = NULL)
{
Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}

/* Alert ("OK ");
Alert (hour );

// The date must be dd (use a regular expression to determine whether it is a number)
VaR err_message = 'date must conform to the YYYY-MM-DD format, hour must be composed of two digits in HH format! ';
VaR hour_patten =/^ [0-9] {2, 2} $/I;
// Var hour_patten =/^/d + $/I;
VaR matcharray = hour. Match (hour_patten );
If (hour. length! = 0 & matcharray = NULL)
{
Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}

// The date must be dd (use a regular expression to determine whether it is a number)
VaR err_message = 'date must conform to the YYYY-MM-DD format, minutes must be composed of two digits in mm format! ';
VaR minute_patten =/^ [0-9] {2, 2} $/I;
// Var minute_patten =/^/d + $/I;
VaR matcharray = minute. Match (minute_patten );
If (minute. length! = 0 & matcharray = NULL)
{
Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}

// The date must be dd (use a regular expression to determine whether it is a number)
VaR err_message = 'date must conform to the YYYY-MM-DD format, and date must consist of two digits in SS format! ';
VaR second_patten =/^ [0-9] {2, 2} $/I;
// Var second_patten =/^/d + $/I;
VaR matcharray = second. Match (second_patten );
If (second. length! = 0 & matcharray = NULL)
{
Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
*/

VaR year_int = parseint (year, 10 );
VaR month_int;
VaR day_int;

If (month. substr (0, 1) = "0 ")
Month_int = parseint (month. substr (1, 1 ));
Else
Month_int = parseint (month );

If (day. substr (0, 1) = "0 ")
Day_int = parseint (day. substr (1, 1 ));
Else
Day_int = parseint (day );

If (year_int % 4 = 0) & (year_int % 100! = 0) | (year_int % 400 = 0 ))
{
VaR day_number = new array (, 30, 31, 30, 31 );
}
Else
{
VaR day_number = new array (, 30, 31, 30, 31 );
}
If (year_int <1, 1900)
{
The year of VaR err_message = field_name + "is meaningless! Enter again! ";

Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
If (month_int <1 | month_int> 12)
{
The month of VaR err_message = field_name + "is incorrect! Make sure it meets the 'yyyy-MM-DD 'format! ";

Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
If (day_int <1 | day_int> day_number [(month-1)])
{
The date section of VaR err_message = field_name + "is incorrect! Make sure it meets the 'yyyy-MM-DD 'format! ";

Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
If (hour <0 | hour> 24)
{
The hour section of VaR err_message = field_name + "is incorrect! Make sure it meets the 'yyyy-MM-DD 'format! ";

Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
If (minute <0 | minute> 60)
{
The minute section of VaR err_message = field_name + "is incorrect! Make sure it meets the 'yyyy-MM-DD 'format! ";

Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}
If (second <0 | second> 60)
{
The second part of VaR err_message = field_name + "is incorrect! Make sure it meets the 'yyyy-MM-DD 'format! ";

Check_result.status = false;
Check_result.message = err_message;
Return check_result;
}

Check_result.status = true;
Check_result.message = "";
Return check_result;
}

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/taojiahuanjia/archive/2008/08/22/2814696.aspx