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Javascript for date

Asked by mrong

at 2024-07-30 11:14:10

Point:500 Replies:40 POST_ID:828640USER_ID:11511

Topic:

JavaScript;Active Server Pages (ASP);Scripting Languages

Greeting,

I have asp form which contains text box MyDate in "30-JUL-2013" format. How to add a validation so MyDate >= currentDate+2days?

something like the following
if(document.frmUser.MyDate.value> ???????)
{
alert("Date can't be less than 2 days from the now.");
return false;
}

thanks.

Author: mrong replied at 2024-07-31 09:28:14

Thank you duncanb7

Expert: duncanb7 replied at 2024-07-31 09:25:05

Thanks, mrong and that code is also useful in future if you need date format "dd-mmm-yyyy hh:mm:ss" with just a little modification of split text command code

Author: mrong replied at 2024-07-31 09:22:51

Thanks!

Expert: duncanb7 replied at 2024-07-31 01:20:39

Complete and compact version is also working too with
date format, dd-mmm-yyyy (such 12-Aug-2013 or 12-Jul-2013),
please try it if need

function  VerifyData(){var obj= document.frmUser.orderdate3;var d = new Date();var a= new Date(Date.parse(obj.value.split("-")[1] +" 1, 2012")).getMonth();var k=Date.UTC(obj.value.split("-")[2],a, obj.value.split("-")[0]);var m=Date.UTC(d.getFullYear(),d.getMonth(),d.getDate());if(k-m<2*86400*1000){ alert("The Event Start Date can't be less than 2 days");return false; }if(isWhitespace(document.frmUser.name.value,true)){alert("Requestor's Name is a required field.");return false; }else return true;}

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Expert: julianH replied at 2024-07-31 00:27:05

The script might have failed due to the console output (if you were using IE).

Here is a cleaned version of the script

<!doctype html><html><head><title>Test</title><script type="text/javascript">function checkDates(obj){	var mydate = customParse(obj.value);	var today = new Date();	var twodays = new Date();	twodays.setDate(today.getDate() + 2);	if (mydate > twodays)		alert('you are ok');	else		alert('date is not right');}function customParse(str) {  var months = ['JAN','FEB','MAR','APR','MAY','JUN',                'JUL','AUG','SEP','OCT','NOV','DEC'],      n = months.length, re = /(d{2})-([a-z]{3})-(d{4})/i, matches;  while(n--) { months[months[n]]=n; } // map month names to their index :)  matches = str.match(re); // extract date parts from string  var month = matches[2];  return new Date(matches[3], months[month.toUpperCase()], matches[1]);}</script></head><body><input type="text" name="MyDate" onblur="checkDates(this);"/></body></html>

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Online version updated as well

Accepted Solution

Expert: duncanb7 replied at 2024-07-30 23:57:27

500 points EXCELLENT

mrong,please try the final version

I have already checked it that is working on my browser
and met all your need,

function getMonth3(mon){   return new Date(Date.parse(mon +" 1, 2012")).getMonth()+1}function VerifyData()  {     var obj= document.frmUser.orderdate3;     var day = obj.value.split("-")[0];    var month = getMonth3(obj.value.split("-")[1]);     var year = obj.value.split("-")[2];     var k=Date.UTC(year, month-1, day);     var d = new Date();     ny=d.getFullYear();     nm=d.getMonth();     nd=d.getDate();     var m=Date.UTC(ny, nm, nd);     if(k-m<2*86400*1000)    {     alert("The Event Start Date can't be less than 2 days");     return false;    }    if(isWhitespace(document.frmUser.name.value,true))    {     alert("Requestor's Name is a required field.");     return false;    } else      return true;  }

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Expert: Michel Plungjan replied at 2024-07-30 23:50:33

Can we please clean up this?

function VerifyData() { if (isWhitespace(document.frmUser.name.value,true)) {   alert("Requester name is a required field.");   return false;  }  var dParts= document.frmUser.orderdate3.value.split("-");  if (dParts.length<3) {   alert("Please enter the date in the required format");   return false;  }  var day = dParts[0];  var month = getMonth3(dParts[1]);  var year = dParts[2];  var k=Date.UTC(year, month-1, day);  var d = new Date();  var ny=d.getFullYear(),      nm=d.getMonth(),      nd=d.getDate()       m=Date.UTC(ny, nm, nd);  if(k-m<2*86400*1000) {    alert("The Event Start Date can't be less than 2 days");    return false;  }  return true;}

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Expert: julianH replied at 2024-07-30 13:39:07

@mrong - yes it will!!!

Go to the link I posted and cut and paste those dates into the text box then hit tab to kick off the script.

The script works and is correct

Expert: duncanb7 replied at 2024-07-30 13:28:08

Just convert Jul to number by additional function of getMonth3() I give you
var month = getMonth3(obj.value.split("-")[1]) ;
Now it is final version, probably it is no issue , fix it tomorrow that should work
And UTC is also take care of hour,minutes, second in the future if you need

function getMonth3(mon){   return new Date(Date.parse(mon +" 1, 2012")).getMonth()+1}function VerifyData()  {     var obj= document.frmUser.orderdate3;     var day = obj.value.split("-")[0];    var month = getMonth3(obj.value.split("-")[1]);     var year = obj.value.split("-")[2];     var k=Date.UTC(year, month-1, day);     var d = new Date();     ny=d.getFullYear();     nm=d.getMonth();     nd=d.getDate();     var m=Date.UTC(ny, nm, nd);     if(k-m<2*86400*1000)    {     alert("The Event Start Date can't be less than 2 days");     return false;    }    if(isWhitespace(document.frmUser.name.value,true))    {     alert("Requestor's Name is a required field.");     return false;    } else      return true;  }

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Author: mrong replied at 2024-07-30 13:27:53

julianH,

on the sample you provided, it wont accept both 30-JUN-2013 & 02-AUG-2013.

Thanks.

Author: mrong replied at 2024-07-30 13:25:15

ok, I am leaving. will come back tomorrow morning.

thanks.

Expert: julianH replied at 2024-07-30 13:25:02

Damn - can't leave this alone.

Please look at the code below - based on previous posts.

<!doctype html><html><head><title>Test</title><script type="text/javascript">function checkDates(obj){	var mydate = customParse(obj.value);	var today = new Date();	var twodays = new Date();	twodays.setDate(today.getDate() + 2);	if (mydate > twodays)		alert('you are ok');	else		alert('date is not right');}function customParse(str) {  var months = ['JAN','FEB','MAR','APR','MAY','JUN',                'JUL','AUG','SEP','OCT','NOV','DEC'],      n = months.length, re = /(d{2})-([a-z]{3})-(d{4})/i, matches;  while(n--) { months[months[n]]=n; } // map month names to their index :)  matches = str.match(re); // extract date parts from stringconsole.log(matches);   var month = matches[2];  return new Date(matches[3], months[month.toUpperCase()], matches[1]);}</script></head><body><input type="text" name="MyDate" onblur="checkDates(this);"/></body></html>

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Working sample here http://www.marcorpsa.com/ee/t335.html
Type in your date as you have it 30-JUN-2013 - It won't accept it
Type in 02-AUG-2013 - it will.

Expert: duncanb7 replied at 2024-07-30 13:16:11

Wait for second just Jul should convert number by getMonth()

Author: mrong replied at 2024-07-30 13:15:06

Yes, The condition should be (m-k<2*86400*1000).

Expert: duncanb7 replied at 2024-07-30 13:09:41

you changed k-m<2*86400*1000 from k-m>2*86400*1000 from my code
that anyway, just up to you for your condition.

Author: mrong replied at 2024-07-30 13:07:19

alert(document.frmUser.orderdate3.value);
returns me 30-JUL-2013

Author: mrong replied at 2024-07-30 13:04:32

Below is html code and my orderdate3 is a date picker.

<font color="#000080" face="Arial"><br>Event Date:</font><font color="#000080"> </font><font face="Arial" color="#BD0000">*  <script>DateInput('orderdate3', true, 'DD-MON-YYYY')</script>

Expert: duncanb7 replied at 2024-07-30 13:03:55

THere is no need for "else", just "return true", right ?

Author: mrong replied at 2024-07-30 13:02:48

I tried alert(m); and alert(k);
Both return undefined.

Expert: duncanb7 replied at 2024-07-30 12:58:48

Must be the form issue, please use more alert() for checking pt for debugging if need

please send me your form/input html code for checking for you

If {

}

If
{

}
else

{

}

THat is error, please review it

Expert: julianH replied at 2024-07-30 12:57:10

Ok must be an invisible day for me - signing out - good luck

Expert: duncanb7 replied at 2024-07-30 12:57:07

Could you send your input box html code in the form

Author: mrong replied at 2024-07-30 12:55:27

duncanb7,

Below is what I changed to, but still not working.

function VerifyData()
{
var obj= document.frmUser.orderdate3;
var day = obj.value.split("-")[0];
var month = obj.value.split("-")[1];
var year = obj.value.split("-")[2];
var k=Date.UTC(year, month-1, day);
var d = new Date();
ny=d.getFullYear();
nm=d.getMonth();
nd=d.getDate();
var m=Date.UTC(ny, nm, nd);
if(k-m<2*86400*1000)
{
alert("The Event Start Date can't be less than 2 days");
return false;
}
if(isWhitespace(document.frmUser.name.value,true))
{
alert("Requestor's Name is a required field.");
return false;
}

else
return true;
}

Expert: duncanb7 replied at 2024-07-30 12:53:21

More compact version

<html><body onload="check()";><form name="myform"><input name="mydate" value="30-7-2013"></form></body></htmL><script type="text/javascript">function check(){var obj= document.myform.mydate;var k=Date.UTC(obj.value.split("-")[2], obj.value.split("-")[1]-1, obj.value.split("-")[0]);var d = new Date();var m=Date.UTC(d.getFullYear(), d.getMonth(), d.getDate());if (m-k>2*86400*1000){alert ("The input box data is far from today more than 2 days, please resubmit the form");}else{alert("Accepted");}}

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Expert: duncanb7 replied at 2024-07-30 12:38:31

Final with your format, some code is fixed
One day=60*60*24*1000= 86400000 millsecond For UTC basis
so 2days=2*864000000 millsecond For UTC basis
IN UTC, month is from 0 -11

<html><body onload="check()";><form name="myform"><input name="mydate" value="31-7-2013"></form></body></htmL><script type="text/javascript">function check(){var obj= document.myform.mydate;var day = obj.value.split("-")[0];var month = obj.value.split("-")[1];var year = obj.value.split("-")[2];var k=Date.UTC(year, month-1, day);var d = new Date();ny=d.getFullYear();nm=d.getMonth();nd=d.getDate();var m=Date.UTC(ny, nm, nd);//alert(year+"==="+(month-1)+"==="+day);//alert(ny+"==="+nm+"==="+nd);//alert(m+"==="+k+"==="+"==="+(m-k));if (m-k>2*86400*1000){alert ("The input box data is far from today more than 2 days, please resubmit the form");}else{alert("Accepted");}}

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Expert: julianH replied at 2024-07-30 12:36:27

I have split these two points so you don't miss one

Look here

http://stackoverflow.com/questions/3509683/validate-two-dates-of-this-dd-mmm-yyyy-format-in-javascript

And here
http://stackoverflow.com/questions/3552461/how-to-format-javascript-date

On how to write a custom date parsing function for the date format you are using (I am assuming you are unable to change the format you are using - not sure why - would be easier but given that is the case then please read the above - the code for what you want is in those links).

Expert: julianH replied at 2024-07-30 12:34:19

tried your suggestion as the following but didn't work

That's because you did not read my post.

Point b) pointed out that your source date format needs to change.

Expert: duncanb7 replied at 2024-07-30 12:32:32

Sorry, "/" should be replaced by "-" for dd-mm-yyyy format
var day = obj.value.split("-")[0];
var month = obj.value.split("-")[1];
var year = obj.value.split("-")[2];

http://www.w3schools.com/jsref/jsref_split.asp

Expert: duncanb7 replied at 2024-07-30 12:31:42

That is for my format 2013/7/12

Now for your format

var day = obj.value.split("/")[0];
var month = obj.value.split("/")[1];
var year = obj.value.split("/")[2];

Author: mrong replied at 2024-07-30 12:30:07

Mydate will always in the format of "dd-mmm-yyyy".
Tried the following but didn't work.

function VerifyData()
{

var obj= document.frmUser.MyDate;
var day = obj.value.split("/")[2];
var month = obj.value.split("/")[1];
var year = obj.value.split("/")[0];

var k=Date.UTC(year, month-1, day);
var d = new Date();

ny=d.getFullYear();
nm=d.getMonth();
nd=d.getDate();

if(m-k>2*86400*1000 )
{
alert("Event Start Date can't be less than 48 hours.");
return false;
}
else
return true;
}

Expert: duncanb7 replied at 2024-07-30 12:23:59

<input name="mydate" value="2013/7/12">

The value can be changed by your client input for different date

Please see also for hour, min, sec if need
at http://www.w3schools.com/jsref/jsref_obj_date.asp

Expert: insoftservice replied at 2024-07-30 12:21:40

var x=new Date();
x.setFullYear(2100,0,14);
var today = new Date();

if (x>today)
{
alert("Today is before 14th January 2100");
}
else
{
alert("Today is after 14th January 2100");
}

Expert: duncanb7 replied at 2024-07-30 12:18:02

One day=60*60*24*1000= 86400000 millsecond For UTC basis
so 2dayss=2*864000000 millsecond For UTC basis

Please take a lot the complete example,
If you need you can also add back hour, minute, second , now
I just year, month, day only for caculation

<html>
<body onload="check()";>
<form name="myform">
<input name="mydate" value="2013/7/12">
</form>
</body>
</htmL>
<script type="text/javascript">
function check(){
var obj= document.myform.mydate;
var day = obj.value.split("/")[2];
var month = obj.value.split("/")[1];
var year = obj.value.split("/")[0];
var k=Date.UTC(year, month-1, day);

//Today now;
var d = new Date();
ny=d.getFullYear();
nm=d.getMonth();
nd=d.getDate();

var m=Date.UTC(ny, nm, nd);
//alert(year+"==="+(month-1)+"==="+day);
//alert(ny+"==="+nm+"==="+nd);
//alert(m+"==="+k+"==="+"==="+(m-k));
if (m-k>2*86400*1000){
alert ("The input box data is far from today more than 2 days, please resubmit the form");
}
else{alert("accepted");}
}
</script>

Other stuff about form input , I think you can take care

Duncan

Author: mrong replied at 2024-07-30 12:14:59

julianH,

tried your suggestion as the following but didn't work

var twodays = new Date();
twodays.setDate(today.getDate() + 2);

if(twoday < document.frmUser.MyDate.value )
{
alert("Event Start Date can't be less than 48 hours.");
return false;
}

Expert: julianH replied at 2024-07-30 12:11:46

Two things

a) The reason your code does not work is that you are trying to compare a javascript date object to a string - you first have to convert your document.frmUser.oMyDate.value to a Javascript Date objct

b) If your form element has the date in the format you describe in your question it won't work because the Date object won't recognise it - try putting it in the form

Month Day, Year Example Aug 2, 2013

Expert: julianH replied at 2024-07-30 12:09:28

This should do it

	var x = new Date('Aug 2, 2013');	var today = new Date();	var twodays = new Date();	twodays.setDate(today.getDate() + 2);	if (x < twodays) alert('Nada');	else alert('you ok');

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Also be sure to read this to understand what date strings you can use
http://tools.ietf.org/html/rfc2822#page-14

Author: mrong replied at 2024-07-30 12:06:41

I have the followings but doesn't work. Any suggestions?

var someDate = new Date();
var numberOfDaysToAdd = 2;
someDate.setDate(someDate.getDate() + numberOfDaysToAdd);

if(someDate < document.frmUser.oMyDate.value )
{
alert("can't be less than 48 hours.");
return false;
}

Author: mrong replied at 2024-07-30 11:58:12

I need samples. thanks

Expert: mcnute replied at 2024-07-30 11:57:35

use moment.js to manipulate your dates.

http://momentjs.com/

Expert: insoftservice replied at 2024-07-30 11:53:37

http://www.w3schools.com/JS/js_obj_date.asp

&nbps;

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