Saturdays

01-19-2004

Hi,

i need to fill a dropdownlist in a frame with only saturdays.

The code must be like:

<select class="fld" size="1" name="arrivaldate">
<option value="17/01/2004">17/01/2004</option>
<option value="24/01/2004">17/01/2004</option>
<option value="31/01/2004">17/01/2004</option>
</select>

and so on....

Can somebody show how to do this with JS?
Thx
Maarten.

01-19-2004

Maarten said:
>
>Hi,
>
>i need to fill a dropdownlist in a frame with only saturdays.
>
>The code must be like:
>
><select class="fld" size="1" name="arrivaldate">
><option value="17/01/2004">17/01/2004</option>
><option value="24/01/2004">17/01/2004</option>
><option value="31/01/2004">17/01/2004</option>
></select>
>
>and so on....
>
>Can somebody show how to do this with JS?

<html>
<head>
<script type="text/javascript">
// function zp zero pads a number to 2 digits.
function zp(n){return (n<10)?"0"+n:n}
var saturdays=new Array();
var now=new Date();
var nextYear=new Date(now.getFullYear()+1,0,1);
// nextYear is the first day of next year
var saturday=new Date(now.setDate(now.getDate()+6-now.getDay()));
// saturday is now the first Saturday after yesterday.
while(saturday<nextYear){
var DDMMYYYY=zp(saturday.getDate())+"/"+
zp(saturday.getMonth()+1)+"/"+
saturday.getFullYear();
saturdays[saturdays.length]="<option value=\""+
DDMMYYYY+"\">"+
DDMMYYYY+"</option>";
saturday.setDate(saturday.getDate()+7);
}
</script>
</head>
<body>
<form>
<select>
<script type="text/javascript">
document.write(saturdays.join(""));
</script>
</select>
</form>
</body>
</html>

01-19-2004

Maarten wrote:

> Hi,
>
> i need to fill a dropdownlist in a frame with only saturdays.
>
> The code must be like:
>
> <select class="fld" size="1" name="arrivaldate">
> <option value="17/01/2004">17/01/2004</option>
> <option value="24/01/2004">17/01/2004</option>
> <option value="31/01/2004">17/01/2004</option>
> </select>
>
> and so on....
>
> Can somebody show how to do this with JS?
> Thx
> Maarten.
>
>

Here is a quick way to do it... I am sure there are others...

var msInDay = 1000 * 60 * 60 * 24;

// Get today's date
var today = new Date();

// Set the date to saturday 0 = Sunday to 6 = Saturday
var dayOffset = (6 - today.getDay()) * msInDay;

var saturday = new Date();

// output the next 12 saturdays
for(i=0; i<12; i++)
{
saturday.setTime( today.getTime() + dayOffset + (7 * i * msInDay) );
document.write(saturday.toDateString() + "<BR>");
}

01-19-2004

Brian Genisio <> writes:

> Here is a quick way to do it... I am sure there are others...
>
> var msInDay = 1000 * 60 * 60 * 24;

Bad idea. The date object has much safer ways to add one day, that
won't get confuzed by changes to and from daylight saving time.

> // Get today's date
> var today = new Date();
>
> // Set the date to saturday 0 = Sunday to 6 = Saturday
> var dayOffset = (6 - today.getDay()) * msInDay;

Just use
var dayOffset = 6 - today.getDay();
and use it on the date, not the milliseconds.

Shorter version:

var date = new Date();
date.setDate(date.getDate()+6-date.getDay()); // first coming Saturday.
for(var i=0;i<10;i++) {
document.write(date.toString() + "<br>");
date.setDate(date.getDate()+7);
}

/L
--
Lasse Reichstein Nielsen -
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html>
'Faith without judgement merely degrades the spirit divine.'

01-19-2004

Maarten wrote:
> i need to fill a dropdownlist in a frame with only saturdays.
>
> The code must be like:
>
> <select class="fld" size="1" name="arrivaldate">
> <option value="17/01/2004">17/01/2004</option>

<script type="text/javascript">
var date, y = 2004; d = new Date(y,0,1);

for (;

{
d.setDate(d.getDate() + ( 6 - d.getDay() ) );
if (d.getFullYear() != y) break;

date = ('00' + d.getDate()).slice(-2) + '/' +
('00' + (d.getMonth() + 1)).slice(-2) + '/' +
d.getFullYear();

document.writeln(
'<option value="', date, '">', date, '</option>'
);
d.setDate(d.getDate() + 1);
}
</script>

HTH;
JW

01-20-2004

Thanx everybody. Fine to find help here. Maarten - Belgium.

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