Date Function Range
Jul 23, 2005
After reading section 15.9.1.1 the ECMAScript Language Specifications I
see that the date range for the Date function is +/- 100,000,000 days
from 01 Jan 1970. This is called an extrapolated Gregorian calendar.
Since the Gregorian calendar did not begin until 15 Oct 1582 what is
the purpose of dates before that date? Wouldn't any computation prior
to that date be meaningless or am I missing something?
The reason I ask is that I have created a date calculator at my web
site. I don't want it to do computations with dates that have no
meaning.
Columbus discovered america on 12 Oct 1492. This must have been with
the Julian Calendar. If I used the Date function to see how many days
it was from that date until now would it be correct?
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May 24, 2010
I want to validate two a date range using javascript, so that my program would check startdate less than end date. The below function only check the year, and it works.
[Code]...
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Jul 23, 2005
What is the maximum valid date range for the date(yyyy,mm,dd) function.
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Feb 6, 2010
I have a start date and end date text boxs. What I would like to achieve is when a submit button is clicked all the available dates between start and end dates should be displayed together with 3 check boxes next to each date (please see below). I am just wondering whether that'sachievablewith jquery, and if so, how I might be able to implement this.
Start date End date
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Apr 24, 2009
I'm selecting records (open PO) and assign a different column base on the due date to quntity that is due but I'm getting a syntax error when i run the query. see code below
SELECT
PRTNUM_10,
CURDUE_10,
[code]....
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Sep 24, 2009
I have the following code which just submits my login form via AJAX. It works fine. But I am wondering if I can adjust this to work for pretty much every form on my website, rather then copy paste this code over and over and only changing the values to match the form respectively.
[Code]...
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Mar 24, 2006
I have a function I call to see if people leave form fields empty. I have been asked by a client to check to make sure of the person's date of birth as well. They gave me the script, however, I am unsure how to do implement it. How do I add this to my existing checks? Code:
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Mar 16, 2011
I am having difficulty trying to change the format of selected date from date picker. This is a test so my code is very simple. Here it is.
[Code]....
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Jul 23, 2005
The problem is, the date displays correctly as a complete date in an
alert box but when I try to build the date from the components (i.e
d.getMonth() etc...) the result is an incorrect date.
How can the date be both correct and incorrect at the same time? The
intial alert(d); displays correctly, but the alert(t + "/" + m + "/" +
y); does not. Code:
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Jun 3, 2005
All I'm trying to do is put the current date into a website that I'm currently working on. Here's the code I'm using:
<script language="javascript">
now=new Date()
month=now.getMonth()+1
today=now.getDate()
year=now.getYear()
current=today+"/"+ month+"/"+year
document.write(current)
</script>
The only problem I'm experiencing is that the date is coming out as 3/6/105.
Where is the "1" coming from in the year? How can I get rid of it??
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Apr 26, 2011
I am creating a form with a date field. i want the date field to autofill onload. The form will then be submitted to a database. My question then, is should I auto fill the date with JS from the users computer, or with PHP from the server that contains the DB, where the report will be stored?
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Dec 7, 2010
I am working on an HTML project that displays a field with a number in the field by each day. What it does is start at 0 on day one. Each day it adds a 1 to the field. Day 2, the field would say 1, then day 3 would say 2, and so on. I am not sure how to approach this. This is also displayed in an HTML format. I want to to be automatic and change as the date changesI will also need a way to reset it back to zero if possible.
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Oct 29, 2011
I am trying to create a function that takes a users input in the form xx/xx/xxxx. Then I need to figure out a way to compare to a new date and give which day of the year it is when using: alert("This is the" +foo+ "day of the year."). Im alittle confused on how to take the users input and compare it somehow to give me the day of the year.:cool:
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Dec 7, 2002
Okay, this an attempt to port PHP's date() function as much as possible to JavaScript. Could use some refactoring though. Any critique, comments, appraisal and any other opinion is very welcome. Feel free to discuss and also take a look at beetles code here: http://www.codingforums.com/showthread.php?s=&threadid=11069
Oh, and the date() function is described here: http://www.php.net/manual/en/function.date.php
Date.prototype.monthNames = new Array(
"January", "February", "March", "April",
"May", "June", "July", "August",
"September", "October", "November", "December"
);
Date.prototype.dayNames = new Array(
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
);
Date.prototype.format = function (formatStr) {
var heap = formatStr.split("");
var resHeap = new Array(heap.length);
var escapeChar = ""; // you can change this to something different, but
// don't use a character that has a formatting meaning,
// unless you want to disable it's functionality
// go through array and extract identifiers from its fields
for (var i = 0; i < heap.length; i++) {
switch(heap[i]) {
case escapeChar:
resHeap[i] = heap[i+1];
i++;
break;
case "a": // "am" or "pm"
var temp = this.getHours();
resHeap[i] = (temp < 12) ? "am" : "pm";
break;
case "A": // "AM" or "PM"
var temp = this.getHours();
resHeap[i] = (temp < 12) ? "AM" : "PM";
break;
case "d": // day of the month, 2 digits with leading zeros; i.e. "01" to "31"
var temp = String(this.getDate());
resHeap[i] = (temp.length > 1) ? temp : "0" + temp;
break;
case "D": // day of the week, textual, 3 letters; i.e. "Fri"
var temp = this.dayNames[this.getDay()];
resHeap[i] = temp.substring(0, 3);
break;
case "F": // month, textual, long; i.e. "January"
resHeap[i] = this.monthNames[this.getMonth()];
break;
case "g": // hour, 12-hour format without leading zeros; i.e. "1" to "12"
var temp = this.getHours();
resHeap[i] = (temp <= 12) ? temp : (temp - 12);
break;
case "G": // hour, 24-hour format without leading zeros; i.e. "0" to "23"
resHeap[i] = String(this.getHours());
break;
case "h": // hour, 12-hour format; i.e. "01" to "12"
var temp = String(this.getHours());
temp = (temp <= 12) ? temp : (temp - 12);
resHeap[i] = (temp.length > 1) ? temp : "0" + temp;
break;
case "H": // hour, 24-hour format; i.e. "00" to "23"
var temp = String(this.getHours());
resHeap[i] = (temp.length > 1) ? temp : "0" + temp;
break;
case "i": // minutes; i.e. "00" to "59"
var temp = String(this.getMinutes());
resHeap[i] = (temp.length > 1) ? temp : "0" + temp;
break;
case "I": // "1" if Daylight Savings Time, "0" otherwise. Works only on the northern hemisphere
var firstDay = new Date(this.getFullYear(), 0, 1);
resHeap[i] = (this.getTimezoneOffset() != firstDay.getTimezoneOffset()) ? (1) : (0);
break;
case "J": // day of the month without leading zeros; i.e. "1" to "31"
resHeap[i] = this.getDate();
break;
case "l": // day of the week, textual, long; i.e. "Friday"
resHeap[i] = this.dayNames[this.getDay()];
break;
case "L": // boolean for whether it is a leap year; i.e. "0" or "1"
resHeap[i] = (this.getFullYear() % 4) ? false : true;
break;
case "m": // month; i.e. "01" to "12"
var temp = String(this.getMonth() + 1);
resHeap[i] = (temp.length > 1) ? temp : "0" + temp;
break;
case "M": // month, textual, 3 letters; i.e. "Jan"
resHeap[i] = this.monthNames[this.getMonth()];
break;
case "n": // month without leading zeros; i.e. "1" to "12"
resHeap[i] = this.getMonth() + 1;
break;
case "O": // Difference to Greenwich time in hours; i.e. "+0200"
var minZone = this.getTimezoneOffset();
var mins = minZone % 60;
var hour = String(((minZone - mins) / 60) * -1);
if (hour.charAt(0) != "-") {
hour = "+" + hour;
}
hour = (hour.length == 3) ? (hour) : (hour.replace(/([+-])(d)/, "$1" + 0 + "$2"));
resHeap[i] = hour + mins + "0";
break;
case "r": // RFC 822 formatted date; e.g. "Thu, 21 Dec 2000 16:01:07 +0200"
var dayName = this.dayNames[this.getDay()].substr(0, 3);
var monthName = this.monthNames[this.getMonth()].substr(0, 3);
resHeap[i] = dayName + ", " + this.getDate() + " " + monthName + this.format(" Y H:i:s O");
break;
case "s": // seconds; i.e. "00" to "59"
var temp = String(this.getSeconds());
resHeap[i] = (temp.length > 1) ? temp : "0" + temp;
break;
case "S": // English ordinal suffix for the day of the month, 2 characters; i.e. "st", "nd", "rd" or "th"
var temp = this.getDate();
var suffixes = ["st", "nd", "rd"];
var suffix = "";
if (temp >= 11 && temp <= 13) {
resHeap[i] = "th";
} else {
resHeap[i] = (suffix = suffixes[String(temp).substr(-1) - 1]) ? (suffix) : ("th");
}
break;
case "t": // number of days in the given month; i.e. "28" to "31"
resHeap[i] = this.getDay();
break;
/*
* T: Not implemented
*/
case "U": // seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
// remember that this does not return milisecs!
resHeap[i] = Math.floor(this.getTime() / 1000);
break;
case "w": // day of the week, numeric, i.e. "0" (Sunday) to "6" (Saturday)
resHeap[i] = this.getDay();
break;
case "W": // ISO-8601 week number of year, weeks starting on Monday
var startOfYear = new Date(this.getFullYear(), 0, 1, 0, 0, 0, 0);
var firstDay = startOfYear.getDay() - 1;
if (firstDay < 0) {
firstDay = 6;
}
var firstMonday = Date.UTC(this.getFullYear(), 0, 8 - firstDay);
var thisDay = Date.UTC(this.getFullYear(), this.getMonth(), this.getDate());
resHeap[i] = Math.floor((thisDay - firstMonday) / (1000 * 60 * 60 * 24 * 7)) + 2;
break;
case "y": // year, 2 digits; i.e. "99"
resHeap[i] = String(this.getFullYear()).substring(2);
break;
case "Y": // year, 4 digits; i.e. "1999"
resHeap[i] = this.getFullYear();
break;
case "z": // day of the year; i.e. "0" to "365"
var firstDay = Date.UTC(this.getFullYear(), 0, 0);
var thisDay = Date.UTC(this.getFullYear(), this.getMonth(), this.getDate());
resHeap[i] = Math.floor((thisDay - firstDay) / (1000 * 60 * 60 * 24));
break;
case "Z": // timezone offset in seconds (i.e. "-43200" to "43200").
resHeap[i] = this.getTimezoneOffset() * 60;
break;
default:
resHeap[i] = heap[i];
}
}
// return joined array
return resHeap.join("");
}
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May 3, 2007
I am working on a hw assignment which gave step-by-step instructions, but my page is still not displaying right (the instructions were pretty vague, but I followed them as the chapter described). I have only had one chapter of JavaScript (in this class which is HTML) so I'm not very familiar with it. I've gone over the code a bunch of times, but still cannot find where I went wrong. Nothing shows up on the web page at all, and I'm not sure why. Here's the code for the .js file: Code:
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Apr 17, 2003
I am working on a series of functions that I keep getting asked about. The following three scripts do this:
--Date Validation
--Calculate Difference Between Dates
--Date Addition or Subtraction
I am sure that these have been done before, but I just filled the last 20 minutes by coding these. I only did a quick browser test, nothing extensive.
<script>
//Date Validation
function DateValid(mo, dy, yr){
TheDate = mo+"/"+dy+"/"+yr;
Date1 = new Date(TheDate)
D=Date1.getDate();
M=Date1.getMonth()+1;
Y=Date1.getYear();
[Code] .....
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Aug 9, 2011
I need date format of some javascript code I'm using.
Here's the code:
<script language="javascript" type="text/javascript">
function to add number of days (accepts number of days to add)
function AddDays(days) {
var thisDate = new Date();
thisDate.setDate(thisDate.getDate() + days);
return thisDate;
}document.write(AddDays(366))
</script>
This is what I get: Thu Aug 09 2012 16:45:34 GMT-0500 (CDT)
I just want: Aug 09 2012
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Nov 1, 2011
I am trying to change the date formats in an invoice.
Currently it is should as this: 2011-11-01 11:57 AM
I should show that in the following format: Nov 01, 2011 11:57 AM
Below is the function I wrote to do this.
But here is the problem. When the hour is a single digit, it takes the space obviously and the result is "undefined".
e.g.
2011-09-15 9:46 AM is showing as Sep 15, 2011 undefined:6 AM
So, splitting the text based on the position is not working fine. Is there is an effective way of doing this?
Code:
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Jul 20, 2006
let say i have an id range Ie. test1, test2, test3 ... How do i call all of them at a time ? I cant use getElementbyId for sure ... Anyone has any clues?
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Feb 25, 2009
I insert text at the text cursor in a contentEditable div. I then have 2 adjacent text nodes so I want to normalize them so there is only 1. The problem is that after I normalize I lose focus on the div and my [text] cursor position. Is there a way around this? How can I save my cursor position and go back to it after I normalize?
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May 28, 2009
I was working on Date() object of javascript. When I write:
today=new Date();
year=today.getYear();
month=today.getMonth();
day=today.getDay();
Here everything was correct but when I print month then I got currentmonth-1 that if the currentmonth is 5 then t get 4. If the current month is 07 then I get 06. At last I worked by adding 1 with month like month+1.
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Apr 27, 2010
I am trying to use my date Object function to get the date from the comp but my variables in my function are coming up undefined.
Here is my function:
function displayTime() {
var currentTime, hour, minute, second, range, m, s
currentTime = new Date()
var hourInt = currentTime.getHours()
var minuteInt = currentTime.getMinutes()
var secondInt = currentTime.getSeconds()
if (hourInt > 12) {
range = "PM"
hourInt -= 12
} else {
range = "AM"
}
hour = String(hourInt)
if (minuteInt < 10) {
m = String(0) + String(minuteInt)
} minute = m
if (secondInt < 10) {
s = String(0) + String(secondInt)
} second = s
document.timeForm.timeBox.value = hour + ":" + minute + ":" + second + " " + range
alert(hour + ":" + minute + ":" + second + " " + range)
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Feb 5, 2010
I am trying to make a time/date function update automatically. when i view the page i get the right time, but i have to refresh the browser in order to update it. How can i do it to automatically update itself.
i want the clients time not the servers time.
<script language="JavaScript" type="text/javascript">
var d=new Date();
var monthname=new Array("January","February","March","April","May","June","July","August","September","October","November","December");
[Code]....
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Sep 21, 2010
What would be the best way to apply a class to a range of elements. For instance the user selects a box with the id of 'day_50', they then select another box with id 'day_70'. I need to apply a class to all boxes with the id between and including 50 - 70?
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Nov 3, 2010
I have to do validation on a form for 2 dates(StartDate and EndDate)the dates cannot be more than four months apart if they are an alert must be displayed. In other words Nov 2009 till March 2010 or May 2009 till September 2009 should be invalid regardless of the day of the month Simply 2 input boxes(StartDate and EndDate) and a submit I've got the other parts of my page worked out just this has me stumped
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Jun 8, 2011
what is the right syntax to use for field that carry hidden value same as autoincrement value in db. The form was able to add n delete this value from db make it the hidden value keep changing. it is possible to check range validation for the value?
in this case the hidden value is sid.
How to correct the line below? --> var chkVal = theForm.("score1"&&sid).value
the full script as below.
<script>
function Form1_Validator(theForm)
{
// require that the To Field be greater than or equal to the From Field
[Code]....
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