JavaScript - Verify Date Function

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.

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 changes. I will also need a way to reset it back to zero if possible.

long story short, I do work for a church, a charity asked me to fix some errors at their web site...1 problem arose and JavaScript is not my strong suite..they have an newsletter request form, just enter your email and your on their newsletter list, as you can see from the code below there is a problem, no valid email verify routine, if you just enter a space in the form, it will accept the info and send a blank request to the charity where an email addie should be... no clue how to fix, as I said javascript is not something I do at all....any help appreciated.

kenrich

=======================

<script type="text/javascript">
$(function(){
$("#rform").submit(function(){return false;});
$("#rsubmit").click(function(){
if($("input#s").val() != "" && $("input#s").val() != 'Enter Email Address'){
$.get("/rsignup.php?email="+$("input#s").val(), function(data){
$("#rdiv").html(data).css("margin-top","15px");
});
} else {
alert('Please enter your email address to subscribe');
}
});
});
</script>
<!-- BEGIN Form -->
<div style="text-align: left;margin: 20px 0 -10px 10px;font-weight:bold;">Email Newsletter:</div>
<div id="newsletterdiv" style="height:25px;">

<form name="optin" action="#" onsubmit="return false;" method="post" style="margin-bottom:2;" id="newsletterform">
<input type="hidden" name="vff" value="103">
<input type="hidden" name="vpp" value="i">

<div>

<input value="Enter Email Address" onfocus="if (this.value == 'Enter Email Address') {this.value = '';}" onblur="if (this.value == '') {this.value = 'Enter Email Address';}" name="ea" id="s" type="text">
<input id="newslettersubmit" value=" " type="submit" name="go">

</div>
</form>
</div>
<!-- END Form -->

I've written a js function to find the difference between two dates. the format being used is dd/mm/yyyy hh:mm. The function returns correct value when give one set of values, but go wrong with another set. examples are given below.

set 1 : Time 1 = 24/02/2011 09:30 , time 2 = 24/02/2011 16:00

Output is corret here. It gives 6 Hours & 30 Minutes (after converting the difference)

set 2: Time 1 = 24/02/2011 09:30 , time 2 = 25/02/2011 16:00

Here, it gives 31 days, 6 Hours & 30 Minutes. My code is given below. Also the alert of dates display strange values. Don't know if it is timezone issue. I wonder what is going wrong here
Code:

function compareDateTime(frmtime,totime)
{
	var date1 = new Date(frmtime);
	var date2 = new Date(totime);
	var diff = new Date();
	alert(date1);
	alert(date2);
	diff = (date2.getTime()-date1.getTime());
	if (diff<0)
	{
		alert("From Time cannot be later than To Time!");
		return 0;
	}
	else if (diff==0)
		{
			alert("From Time cannot be equal with To Time!");
			return 0;
		}
 
	else
	{
		return diff;
	}
}

The returned diff value is broken down as following:
Code:

if (diff>0)
	{
		days = Math.floor(diff / (1000 * 60 * 60 * 24));
 		diff -= days * (1000 * 60 * 60 * 24);
 		hours = Math.floor(diff / (1000 * 60 * 60));
 		diff -= hours * (1000 * 60 * 60);
 		mins = Math.floor(diff / (1000 * 60));
 		alert(days+","+hours+","+mins);
		return true;
	}

what am i doing wrong here?

So I want this function to return the date in the format: 4-Jan-2011. I feel like I have to make the variables strings or something but I can't figure it out, I'm kinda new to javascript.

Code:

function calander(TheDay) {
                var theDate = new Date();
                var day = new theDate.getDay();
                var month = new theDate.getMonth();
                var year = new theDate.getFullYear();
                
                if (month == 0) {month = "Jan";}if (month == 1) { month = "Feb"; }
                if (month == 2) { month = "March"; }if (month == 3) { month = "April"; }
                if (month == 4) { month = "May"; }if (month == 5) { month = "June"; }
                if (month == 6) { month = "July"; }if (month == 7) { month = "Aug"; }
                if (month == 8) { month = "Sept"; }if (month == 9) { month = "Oct"; }
                if (month == 10) { month = "Nov"; }if (month == 11) { month = "Dec"; }

                TheDay.value = day + "-" + month + "-" + year;
}

Not sure if this is possible in javascript:

I'm looking for two different dates (bill date and due date) on an invoice that are captured by OCR. If one of them exists, but the other does not, I want the empty field to be 14 days before (or after) the other.

For example:
if the bill date is 7/27/2010 and the due date was not captured, I want to set the due date as 8/10/2010 (14 days after the bill date).

If the due date was captured as 8/10/2010, but the due date is blank, I want to assign the bill date as 7/27/2010 (14 days before the due date).

if both dates have values, do nothing.

Thanks.

I have a drop down menu where people can select a month, day and year. Based on their selection, I want to show them an image.

If their selection is >= July 26, 2010 but <= July 25, 2011, show the red image;
If their selection is >= July 26, 2011 but <= July 25, 2012, show the white image;
If their selection is >= July 26, 2012 but <= July 25, 2013, show the blue image;
If their selection is >= July 26, 2013 but <= July 25, 2014, show the yellow image;

I don't know how to compare a selected date to a range of dates like this.

Hello,

I really need your help with one.

How can I use the following code below to save the date from my popup window datepicker back into a var and relay it back onto its parent page?

I can't seem to figure this out:

Code:

<html>



<head>

<script>
	
	function open_cal() {
	

  var str_html	= 	""
  				+	"<!DOCTYPE html>\n"
				+	"<html lang=\"en\">\n"
				+	"<head>\n"
				+	"<meta charset=\"utf-8\">\n"
				+	"<title>CALENDAR</title>\n"
				+	"<link href=\"jq/jquery-ui.css\" rel=\"stylesheet\" type=\"text/css\">\n"
				+	"<script src=\"jq/jquery.min.js\" type=\"text/javascript\"></" + "script>\n" 
				+	"<script src=\"jq/jquery-ui.min.js\" type=\"text/javascript\"></" + "script>\n"
				+	"<script src=\"jq/datepicker.js\" type=\"text/javascript\"></" + "script>\n"
				+	"</head>\n"
				+	"<body>\n"
				+	"<div id=\"text\" style=\"font: bold 10pt Tahoma\">Enter Approval Date:</div>\n"
  				+	"<div id=\"datepicker\"></div>\n"
  				+	"</body>\n"
  				+	"</html>"
  				
var j = window.open("","CALENDAR","width=200,height=250,status=no,resizable=yes,top=200,left=200")
	j.opener = self;
	j.document.write(str_html);
}


</script>	
	

		
</head>

<body>

<input onclick="open_cal()" type="button" value="Open" name="B1">


</body>

</html>

Datepicker.js:
Code:

$(function() {
	
		$( "#datepicker" ).datepicker({ 
		
		dateFormat: 'dd/mm/yy',
		
		onSelect: function(dateText, inst) { 
		alert(dateText)
		window.close()
		
		} 
		
		})
		
		
		
		
});

Any help with this is greatly and mostly appreciated.

Thanks in advance,

Cheers,

J

Hi,

I've inherited a Form which calculates a future date based on a calculation and then inserts today's date and the future date into a database. The day part of the date is formatted as a number. This is fine, but up to 9 the numbers display in single figures with no leading zeros. I want them to display leading zeros (e.g. 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11... 30, 31)

So;
1/12/2010 is NOT wanted
01/12/2010 IS wanted

The inherited code originally set the Month names as "Jan", "Feb" etc, and it was easy to kludge these to 01, 02... 12, but I suspect there's a more elgant solution to this as well, this bit of the code works so it's not as vital to neaten this but my database needs dd/mm/yyyy format (it's a third party email program).

Code:

 </script>

<script type="text/javascript">
var todaysDate = new Date();

function updateExpiryDate(){

	var weeklyMileage = document.getElementById('AvWeeklyMileage').value;
	var expiryDate;
	var weeks = 0;
	var expiryDateString = '';

	if (!isNaN(parseInt(weeklyMileage))){
		weeks = 700/weeklyMileage;
		expiryDate = new Date(todaysDate.getTime() + (1000 * 3600 * 24 * 7 * weeks));

		var expiryDateString = expiryDate.getDate() + '/' + getMonthString(expiryDate.getMonth()+1) + '/' + expiryDate.getFullYear();

		document.getElementById('expiryDate').innerHTML = expiryDateString;
		document.getElementById('ShoeExpiryDate').value = expiryDateString;
	} else {
		document.getElementById('ShoeExpiryDate').value = '';
		document.getElementById('expiryDate').innerHTML = 'Please enter a valid weekly average mileage'
	}

}

function getMonthString(monthNumber){
	var monthString = "";
	switch(monthNumber){
		case 1:
			monthString = "01";
			break;
		case 2:
			monthString = "02";
			break;
		case 3:
			monthString = "03";
			break;
		case 4:
			monthString = "04";
			break;
		case 5:
			monthString = "05";
			break;
		case 6:
			monthString = "06";
			break;
		case 7:
			monthString = "07";
			break;
		case 8:
			monthString = "08";
			break;
		case 9:
			monthString = "09";
			break;
		case 10:
			monthString = "10";
			break;
		case 11:
			monthString = "11";
			break;
		case 12:
			monthString = "12";
			break;
		default:
			// do nothing;
	}
	return monthString;
}

function setTodaysDate(){
	var todaysDateString = todaysDate.getDate() + '/' + getMonthString(todaysDate.getMonth()+1) + '/' + todaysDate.getFullYear();
	document.getElementById('todaysDate').innerHTML =todaysDateString;
	document.getElementById('DateOfPurchase').value = todaysDateString;

}

Can someone point me in the right direction please?

Hi,
I need to add days to a date in javascript,
My requirement is as follows:
Date is coming from a textbox.
eg:- 26/07/2010

days from this statement

var day1=document.getElementById('<%=HiddenDate.ClientID %>').value;

an eg:- if the date is 28/01/2012 and days Needed to be added=5
the added date should be 02/02/2012.
Can anybody help me?

Thanks
Jamuna

Using Adobe Form Javascript validation, how would I do this code for Visual Basic in Javascript (non web)

Code:

If PurchaseDate.Value > Date Then
MsgBox ("PurchaseDate cannot be greater than Today's Date!")
Cancel = True
End If

Something along these lines but this isnt working:

Code:

If (PurchaseDate.Value > Date) Then 
{
app.alert ("Purchase Date cannot be greater than Today's Date!");
}

Thanks

hello there
this is in vb script. but i dont where to post it. can any one hlep me out plzz
I need to check if the date entered by user is within 5th date from current date.

I am trying to do it this way
entered date has month and date value
Code:

sResvDate = 01/24
Set sMaxDays to getdate(5)

but get date will give year too. and how do i compare if it less than 5th day or not.

Hi folks,
i am trying to generate a dynamic datefield with date mask "mm/dd/yyyy" and trying to insert it into Oracle db ...i still got the error ORA invalid month ehich means the date filed is not recognized as date:

below is what i am doing :

newStartDate = document.createElement( 'INPUT' ); newStartDate.setAttribute('type','Date'); newStartDate.setAttribute('id1','id'+ elementid+elementrow); newStartDate.setAttribute('name','StartDateName'+ elementid+elementrow); newStartDate.size=8; newStartDate.style.backgroundColor= bgc;

any help thanks ??

Also i want to add a datepicke to this textbox..how it is posible / other option is to use Jquery datepicker but could not know how to impement it

thanks again

Hi,

I am facing a problem in passing replace() function as an argument in user defined java function, can any one help me how to resolve it?

intention is to pass a file path to my user defined function, but before passing the path i want to replace the character '\' to '\\'

I am posting my javascript function he

<a href="#" onclick="OpenDocPreview('<%# Eval("PATH")%>'.replace(/\\/g,"\\\\"), '<%# Eval("Filename")%>')"><%# Eval("DocTitle") %></a>


function OpenDocPreview(url, docname) {
alert('message from search base : ' + url + ' ' + docname);
}

thank you,

I was working on a tutorial for some ajax uploading stuff and I ran across a new function syntax I don't recognize. I am not a Javascript pro, but I am not a newbie either. here is the code I am working on:

Code:

		function handleFileSelect(e){
			var files = e.target.files;
			var output = [];
			for(var i=0,f;f=files[i];i++){
				if(f.type.match('image.*')){
					var reader = new FileReader();
					
					reader.onload = (function(theFile){
						return function(e){
							var span = document.createElement('span');
							span.innerHTML = ['<img class="thumb" src="',e.target.result,'" title="',theFile.nbame,'" />'].join('');
							document.getElementById('list').insertBefore(span,null);
						};
					})(f);
					
					reader.readAsDataURL(f);
				}
			}
			document.getElementById('list').innerHTML = '<ul>'+output.join('')+'</ul>';
		}
		document.getElementById('files').addEventListener('change',handleFileSelect,false);

To be a little more clear, the code in question is that is the very middle. The syntax I don't understand is:

Code:

class.event = (function(arguments){
     //stuff you put in a function...
})(more Arguments?);

I tried to customize a simple one to learn for myself and I wrote this:

Code:

var a = 'A';
var b = 'B';

test = (function(t){
     alert(t);
     alert(b);
})(b);

test(a);

The browser would alert 'B' and that's it. The console would tell me that 'test is not a function.' OK, so I am confused.

The topmost code works. What I am wondering is what the syntax is called for creating a function (or event listener?) that way, and how it works. Although if I new what it was called I could just google how it works.