Unexpected Result From Date Object Manipulation?
Mar 6, 2009
In the below, I would expect this to return the number of milliseconds since the epoch. Instead, it's generating a massive negative number. I presume I've gone wrong with the set[Blah] methods.
javascript Code:
var date_text = '2009-03-06 12:00:00';
var d_tried = new Date();
d_tried.setYear(parseInt(date_text.substr(0,3)));
d_tried.setMonth(parseInt(date_text.substr(5,6)));
d_tried.setDate(parseInt(date_text.substr(8,9)));
[Code]....
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Jan 10, 2009
I have a form which I need submit using ajax. I already got all the needed query from that form, but when I tried get the action address I got [object HTMLInputElement] instead of expected address blah.php.
Here is a quick example to demonstrate this behavior:
Code:
The problem is that I named the button as "action" and this.action is returning the button object instead of the action of the form.
I can't remove the form element with name "action" from that form because of the script that accepts the data, but I need get somehow the form's action (url).
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Aug 17, 2011
I'm trying to get a full date. In this script I want the user to be able to enter a date and get a 1000 day result a full (date) mm/dd/yyy. So far this give me the year only. I've tried so many ways.
<script language="javascript">
var reply = prompt("Please enter the date you and your love begin dating (mm/dd/yyyy)", " ");
var newstring = new String(reply);
var arrTemp = new Array();
arrTemp = newstring.split("/");
[Code]....
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Aug 4, 2009
I created a new Javascript *class*
function TableData(headers, row)
{
this.headerArr = headers;
this.rowArr = row;
[Code].....
when I call it, though (printTable()) i get the error
Value undefined (result of expression parent.B.obj.printTable) is not object.
i dont rly understand javascript functions... but i think that should work? idk i call it on an onclick event
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Jul 23, 2005
How do check for a date object?
<script type="text/javascript">
var d=new Date()
var arr=new Array("Jun 5",d,"Mar 16")
for(i=0;i<arr.length;i++){
if(arr[i] != Date()) // is string or is not date object
document.write(arr[i] + "<br>")
}
</script>
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Jul 20, 2005
According to the Safari browser the world began on "Fri Dec 13 1901 15:45:52 GMT-0500", but I need to be able to get around this limitation.
I am interested in dates from 1500 to 1901, as far as I can determine, there are 14 possible calendar variations.
Year starts on Sun, Mon..... Leap year starts on Sun, Mon..
I can label these early year "types" as a number between 0 and 13.
Let's say 2005 is type 5, and that 1655 is too. (In both years Jan 1 falls on a Saturday)
I'm trying to create a function that will identify the "type" of year.
function getYearType(year){
return Number // number between 0 and 13
}
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May 29, 2007
Am i breaking any rules when I loop dates like
// Determine Memorial Day
intFlag = 0;
memDayHol = new Date (currentYear, 4, 31);
while (intFlag == 0) {
if (memDayHol.getDay() == 1) {intFlag =1;}
else {memDayHol = memDayHol - 1;}
}
I can find no docs that one can use the '+' operator directly on a date
object, and it assumes adding/subtracting a day(s). Is this deprecated
code?
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Jul 9, 2010
How to extend the constructor for the date object of the javasccript so that whenever a call is made to the constructor, I want to perform a particular action? Basically how to define wrappers for default javascript methods or objects like Date() so that I can perform some action and then invoke the original method? So basically if I have something like var a = new Date(); I want it to (say) alert the value of the date everything Date() is called and then execute the default date constructor.
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Feb 7, 2011
The goal is for selectedDay to be assigned the value of the system variable Mainpackage.subclass0.subclass1.firstDay and then incremented by two days. Mainpackage.subclass0.subclass1.firstDay needs to be unchanged.
Important system variable in red. To be 'manipulated and used' variable in green. Even with an intermediary, third, dummy variable it doesn't work:
Console log is:
It doesn't work in my webapp : All variables change at the same time.
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Jun 15, 2011
I was wondering how you would create a javascript Date object from an ISO8601 string? We have done this successfully in FF4, but not IE.
If we try the following in FF4 it works:
alert(new Date("20091107T12:15:00))
In IE it returns:
'NaN'
What would be the Date standard used in JavaScript and AJAX from the server to the client? We were thinking about using UTC
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May 3, 2010
I have a question about what the most certain method to obtain the correct UTC time in javascript is.On my forum, there is a countdown clock, that should show the same amount, wherever the user is located. I use UTC in javascript to get the current time, but I have trouble getting consistent results.I have tried two methods:Method 1:
Code:
var d = new Date();
var localTime = d.getTime();
[code]......
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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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Dec 6, 2002
Well, this is acutally a couple different scripts. First is the custom date object myDate which retrieves pretty much every value that you'd need from a date and sets it as a property. If no argument is supplied, the current time and date is used. If you do supply an argument, you can send an existing javascript Date object, or a string that is compatible with declaring a normal javascript Date object.
The 2nd part of this script is the method getDate (and some accompanying String methods) that allow you to retrieve the date as a string by passing it a format string just like the PHP date() (http://www.php.net/manual/en/function.date.php) function accepts. The code posted below includes sufficient (I think) examples to help you understand what is going on. You will notice that I didn't duplicate EVERY code over from PHP, and a few are slightly different. Those that I left out I felt weren't very necessary, or I didn't feel like doing the algorithm for them :D.
Both myDateObj.getDate() and PHP's date() allow you to include text into the string that you don't want parsed, but each handles it differently. In PHP, you need to escape characters normally with a backslash. For getDate you need to proceed each character with a pipe "|". So, instead of$dateStr = date("Day z");as it would be in PHP, you would usevar d = new myDate();
var dateStr = d.getDate("D|a|y| z");There are more examples of how this works below.
Note: There is also a nice arrayReplace() method for strings that is handy for doing multiple replace() operations all at once, so I guess this is really like 3 handy scripts ;)
<html>
<head>
<title>test</title>
<meta http-equiv="expires" content="0">
<script type="text/javascript">
/*** First Part of Script, the custom date object ***/
function myDate(dateStr) {
if (typeof dateStr != 'undefined') {
var d = new Date(dateStr);
this.dateString = dateStr;
}
else if (typeof dateStr == 'object')
var d = dateStr;
else
var d = new Date();
var months = ['January','February','March','April','May','June','July','August','September','October','November',' December'];
var weekDays = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
var monthDays = [31,28,31,30,31,30,31,31,30,31,30,31];
this.epoch = d.getTime();
this.epochS = Math.round(this.epoch / 1000);
this.year4 = d.getFullYear();
this.year2 = parseInt(this.year4.toString().substring(2));
this.leap = (this.year4 % 400 == 0) ? true : (this.year4 % 4 == 0 && this.year4 % 100 != 0) ? true : false;
if (this.leap) monthDays[1]++;
this.mnth = d.getMonth();
this.month = this.mnth + 1;
this.month_2 = leadingZero(this.month);
this.monthName = months[this.mnth];
this.monthNameShort = this.monthName.substring(0,3);
this.days = monthDays[this.mnth];
this.dy = d.getDay();
this.day = this.dy + 1;
this.dayName = weekDays[this.dy];
this.dayNameShort = this.dayName.substring(0,3);
this.date = d.getDate();
this.date_2 = leadingZero(this.date);
this.suffix = (this.date % 10 == 1 ) ? "st" : (this.date % 10 == 2) ? "nd" : (this.date % 10 == 3) ? "rd" : "th";
this.hours24 = d.getHours();
this.hours24_2 = leadingZero(this.hours24)
this.hours12 = (this.hours24 == 0) ? 12 : (this.hours24 > 12) ? this.hours24-12 : this.hours24;
this.hours12_2 = leadingZero(this.hours12);
this.minutes = d.getMinutes();
this.minutes_2 = leadingZero(this.minutes);
this.seconds = d.getSeconds();
this.seconds_2 = leadingZero(this.seconds);
this.millis = d.getMilliseconds();
this.ampm = (this.hours24 == 0) ? "am" : (this.hours24 >= 12) ? "pm" : "am";
this.GMTstring = d.toGMTString();
this.offset = d.getTimezoneOffset();
function leadingZero(num) {
return (num < 10) ? "0" + num : num.toString();
}
}
myDate.prototype.getDayOfYear = function() {
var total = 0;
var monthDays = [31,28,31,30,31,30,31,31,30,31,30,31];
if (this.leap) monthDays[1]++;
for (var i=0; i<this.mnth; total += monthDays[i++]) {}
total += this.date;
return total;
}
/*** Second part of script, the PHP-like parsed output ***/
myDate.prototype.getDate = function(str) {
var p = ['a','A','B','d','D','F','g','G','h','H','i','I','j','l','L','m','M','n','O','r','s','S','t','T','U', 'w','W','Y','y','z','Z'];
var r = new Array();
var i = 0;
var delChar = "|";
var sNull = "null".delimit(delChar)
r[i++] = this.ampm.delimit(delChar);
r[i++] = this.ampm.toUpperCase().delimit(delChar);
r[i++] = sNull;
r[i++] = this.date_2;
r[i++] = this.dayNameShort.delimit(delChar);
r[i++] = this.monthName.delimit(delChar);
r[i++] = this.hours12;
r[i++] = this.hours24;
r[i++] = this.hours12_2;
r[i++] = this.hours24_2;
r[i++] = this.minutes_2;
r[i++] = sNull;
r[i++] = this.date;
r[i++] = this.dayName.delimit(delChar);
r[i++] = (this.leap)?1:0;
r[i++] = this.month_2;
r[i++] = this.monthNameShort.delimit(delChar);
r[i++] = this.month;
r[i++] = this.offset;
r[i++] = this.GMTstring.delimit(delChar);
r[i++] = this.seconds_2;
r[i++] = this.suffix.delimit(delChar);
r[i++] = this.days;
r[i++] = sNull;
r[i++] = this.epochS;
r[i++] = this.dy;
r[i++] = sNull;
r[i++] = this.year4;
r[i++] = this.year2;
r[i++] = this.getDayOfYear();
r[i++] = sNull;
for (i=0; i<p.length; i++)
p[i] = "/" + p[i] + "(?!|)/g";
return str.arrayReplace(p, r).replace(/|/g,"");
}
String.prototype.arrayReplace = function(arrP, arrR) {
var p, s = this;
for (var i=0; i<arrP.length; i++) {
var flags = arrP[i].substring(arrP[i].lastIndexOf("/")+1);
var regex = arrP[i].substring(1,arrP[i].lastIndexOf("/"));
p = new RegExp(regex, flags);
s = s.replace(p, arrR[i]);
}
return s;
}
String.prototype.delimit = function(char) {
var s = "";
for (var i=0; i<this.length; i++) {
s += this.charAt(i) + char;
}
return s;
}
</script>
</head>
<body>
<script type="text/javascript">
/*** Example using current date/time ***/
var md1 = new myDate();
document.write(md1.getDate("l jS of F Y h:i:s A")+"<br>");
document.write(md1.getDate("T|o|d|a|y| i|s| m.d.y")+"<br>");
document.write(md1.getDate("D M j G:i:s Y")+"<br>");
document.write("It " + (md1.leap?"is":"is not") + " a leap year<br>");
document.write("The unix epoch occurred " + md1.epochS + " seconds ago");
document.write("<hr>");
/*** Example using javascript Date object as argument ***/
var d1 = new Date(2000, 01, 02, 15, 15, 15);
var md2 = new myDate(d1);
document.write(md2.getDate("l jS of F Y h:i:s A")+"<br>");
document.write(md2.getDate("T|o|d|a|y| i|s| m.d.y")+"<br>");
document.write(md2.getDate("D M j G:i:s Y")+"<br>");
document.write("It " + (md2.leap?"is":"is not") + " a leap year<br>");
document.write("The unix epoch occurred " + md2.epochS + " seconds ago");
document.write("<hr>");
/*** Example using Date object compatible string as argument ***/
var md3 = new myDate("December 10, 1978 12:23:00");
document.write(md3.getDate("l jS of F Y h:i:s A")+"<br>");
document.write(md3.getDate("T|o|d|a|y| i|s| m.d.y")+"<br>");
document.write(md3.getDate("D M j G:i:s Y")+"<br>");
document.write("It " + (md3.leap?"is":"is not") + " a leap year<br>");
document.write("The unix epoch occurred " + md3.epochS + " seconds ago");
</script>
</body>
</html>
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Feb 7, 2011
The goal is for selectedDay to be assigned the value of the system variable Mainpackage.subclass0.subclass1.firstDay and then incremented by two days. Mainpackage.subclass0.subclass1.firstDay needs to be unchanged.
Important system variable in red.
To be 'manipulated and used' variable in green.
Even with an intermediary, third, dummy variable it doesn't work:
Code:
//Declarations and instantiations
var systemDate = new Date();
var selectedDay = new Date();[code]....
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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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