JavaScript string type converted to date type method

If there are spaces or other delimiters in the string, you can split the Split method, return an array, and

The number of years in the array is passed as a parameter to the new date () to generate the date type;
If there is no special separator, you can use the substr (X,y) method to take a substring to generate a date, substr (x,y

X represents the starting position of the string, and Y indicates the length of the substring!
If the string is "/" split, it can be converted using Date.parse (DATESTR)

<mce:script language= "JavaScript" ><!--

function Stringtodate (DATESTR)
{
var converted = Date.parse (' 2009/01/05 ');
alert (converted);
Alert (DATESTR.SUBSTR (0,4) + "/" +datestr.substr (5,2) + "/" +datestr.substr (8,2));
var mydate = new Date (converted);
alert (mydate);
Alert (mydate.getfullyear () + "/" + (Mydate.getmonth () +1) + "/" +mydate.getdate

());
if (isNaN (DATESTR))
{
var Delimcahar = datestr.indexof ('/')!=-1? ' /':'-';
Datestr = "2008-08-08";
var arys= datestr.split ('-');
var d = new Date (Arys[0], arys[1], arys[2]);
alert (d);
}
alert (mydate);
return mydate;
}
--></mce:script>

The use of regular processing

New Date (A + "/" + B + "/" + C). getmonth () = = B-1

A, B, C can be (or even null, Boolean) as long as they are variables that can be converted to numbers, and you can use the new

Date (Y,M,D) creates a new date format,
And according to your request, new Date (A,b,c). getmonth () = = B-1 is true, otherwise it is not satisfied

function IsDate (dateValue) {
var regex = new RegExp ("^ (?:(?:( [0-9] {4} (-|/) (?:(?: 0? [1,3-9]|1[0-2]) (-|/)

(?: 29|30) | ((?: 0? [13578]|1[02]) (-|/) 31)) | ([0-9]{4} (-|/) (?: 0?) [1-9]|1[0-2]) (-

|/) (?: 0? [1-9]|1d|2[0-8]) | (((?:( DD (?: 0 [48]| [2468] [048]| [13579] [26]) | (?: 0

[48]00| [2468] [048]00| [13579] [26]00)) (-|/) 0?2 (-|/) 29))));
if (!regex.test (DateValue))
return false;
Else
return true;
}
Pass it over to judge

Instance

function Checkdate (text) {
if (!text) return false;
Text = Text.replace (/[/-]0?/g, "/");
if (!text.match (/^d{4}/d{1,2}/d{1,2}$/)) return false;
var d = new Date (text);
return [D.getfullyear (), D.getmonth () + 1, d.getdate ()].join ("/") = = text;
}

Document.open ();
var datas = ["", "2010-01-01", "2010/02/30", "2010/02", "2010/22/30",

"2012/2/29", "2012/02/29"];
for (var i = 0; i < datas.length; i++) {
document.write (Datas[i], "=", Checkdate (Datas[i)), "<br/>");
}
Document.close ();

Output
Assembly Code
=false
2010-01-01=true
2010/02/30=false
2010/02=false
2010/22/30=false
2012/2/29=true
2012/02/29=true

Common methods

<script language= "Web Effects" >
e///////////////////////
Get the current date, format YYYY-MM-DD
////////////////////////////////////////////////////////
function Getcurrentdate ()
{
var year=0;
var month=0;
var day=0;
var currentdate = new Date ();

Return changedatetostring (currentdate);
}

e///////////////////////
Get the current date, format Yyyy-mm-dd hh:mm
////////////////////////////////////////////////////////
function GetCurrentTime ()
{
var year=0;
var month=0;
var day=0;
var currentdate = new Date ();

Return changetimetostring (currentdate);
}

////////////////////////////////////////////////////////
Converts a date type to a string format YYYY-MM-DD
////////////////////////////////////////////////////////
function changedatetostring (Datein)
{
var year=0;
var month=0;
var day=0;

var currentdate= "";

Initialization time
Year = Datein.getyear ();
Month = Datein.getmonth () +1;
Day = Datein.getdate ();

currentdate = year + "-";
if (Month >= 10)
{
currentdate = currentdate + Month + "-";
}
Else
{
currentdate = currentdate + "0" + Month + "-";
}
if (Day >= 10)
{
currentdate = currentdate + day;
}
Else
{
currentdate = currentdate + "0" + day;
}

return currentdate;
}

///////////////////////////////////////////////////////
Converts a date type to a string format Yyyy-mm-dd hh:mm
////////////////////////////////////////////////////////
function changetimetostring (Datein)
{
var year=0;
var month=0;
var day=0;
var Hour = 0;
var Minute = 0;
var currentdate= "";

Initialization time
Year = Datein.getyear ();
Month = Datein.getmonth () +1;
Day = Datein.getdate ();
Hour = Datein.gethours ();
Minute = Datein.getminutes ();

currentdate = year + "-";
if (Month >= 10)
{
currentdate = currentdate + Month + "-";
}
Else
{
currentdate = currentdate + "0" + Month + "-";
}
if (Day >= 10)
{
currentdate = currentdate + day;
}
Else
{
currentdate = currentdate + "0" + day;
}

if (Hour >=10)
{
currentdate = currentdate + "" + Hour;
}
Else
{
currentdate = currentdate + "0" + Hour;
}
if (Minute >=10)
{
currentdate = currentdate + ":" + Minute;
}
Else
{
currentdate = currentdate + ": 0" + Minute;
}
return currentdate;
}
</script>