How do i change this?

[#1]

/*** Get the ISO week date week number */

Date.prototype.getWeek = function () {
    // Create a copy of this date object;
    var target  = new Date(this.valueOf());
    //var target  = new Date(this.getField("WeekBegin").value);

    // ISO week date weeks start on Monday;
    // so correct the day number;
    var dayNr   = (this.getDay() + 6) % 7;

    // ISO 8601 states that week 1 is the week;
    // with the first Thursday of that year.;
    // Set the target date to the Thursday in the target week;
    target.setDate(target.getDate() - dayNr + 3);

    // Store the millisecond value of the target date;
    var firstThursday = target.valueOf();

    // Set the target to the first Thursday of the year;
    // First set the target to January first
    target.setMonth(0, 1);
    // Not a Thursday? Correct the date to the next Thursday
    if (target.getDay() != 4) {
        target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7);
    }

    // The weeknumber is the number of weeks between the
    // first Thursday of the year and the Thursday in the target week
    return 1 + Math.ceil((firstThursday - target) / 604800000); // 604800000 = 7 * 24 * 3600 * 1000
}

var oDate = new Date(); // create date object;
var nWeekNumber = oDate.getWeek(); // get the week number for the date object;
//app.alert("For " + util.printd("ddmmyy", oDate) + " it is week " + nWeekNumber, 3, 0);

this.getField("WeekNumber").value = nWeekNumber;

Now I Want to be able to use the "weekbegin" field text box (ddmmyy) to work out the week number, but instead its using the current date.

What do I change to get it to use the "weekbegin" as the date instead of the current date it uses?

[#2]

/*** Get the ISO week date week number */

Date.prototype.getWeek = function () {
    // Create a copy of this date object;
    var target  = new Date(this.valueOf());
    //var target  = new Date(this.getField("WeekBegin").value);

    // ISO week date weeks start on Monday;
    // so correct the day number;
    var dayNr   = (this.getDay() + 6) % 7;

    // ISO 8601 states that week 1 is the week;
    // with the first Thursday of that year.;
    // Set the target date to the Thursday in the target week;
    target.setDate(target.getDate() - dayNr + 3);

    // Store the millisecond value of the target date;
    var firstThursday = target.valueOf();

    // Set the target to the first Thursday of the year;
    // First set the target to January first
    target.setMonth(0, 1);
    // Not a Thursday? Correct the date to the next Thursday
    if (target.getDay() != 4) {
        target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7);
    }

    // The weeknumber is the number of weeks between the
    // first Thursday of the year and the Thursday in the target week
    return 1 + Math.ceil((firstThursday - target) / 604800000); // 604800000 = 7 * 24 * 3600 * 1000
}

var oDate = new Date(); // create date object;
var nWeekNumber = oDate.getWeek(); // get the week number for the date object;
//app.alert("For " + util.printd("ddmmyy", oDate) + " it is week " + nWeekNumber, 3, 0);

this.getField("WeekNumber").value = nWeekNumber;

Now I Want to be able to use the "weekbegin" field text box (ddmmyy) to work out the week number, but instead its using the current date.

What do I change to get it to use the "weekbegin" as the date instead of the current date it uses?

[#3]

Change this line:

var oDate = new Date();

To:

var oDate = util.scand("mm/dd/yyyy", this.getField("weekbegin").valueAsString);

Adjust the date format if necessary.

However, this will return the results for the current date if the field is empty, so you might want to add a condition that checks for that.

[#4]

Ok I tried that, but doesn't show any results.

var oDate = util.scand("mmddyy", this.getField("WeekBegin").valueastring);

is what I have, However if the "WeekBegin" field is filled or not it doesn't show any value?

[#5]

That's not the code I posted.

[#6]

You needed to change one line of code and not delete all of the code.

So the only code for the field would be:

// var oDate = new Date(); // create date object;

var oDate = util.scand("mm/dd/yyyy", this.getField("weekbegin").valueAsString); // create date object for the value of "weekbegin" field;

var nWeekNumber = oDate.getWeek(); // get the week number for the date object;

//app.alert("For " + util.printd("ddmmyy", oDate) + " it is week " + nWeekNumber, 3, 0);

this.getField("WeekNumber").value = nWeekNumber;

All the code above that piece of code should be placed in the Document level JavaScript.

[#7]

ok.

so I have this on the field "WeekNumber":

//var oDate = new Date(); // create date object;
var oDate = util.scand("ddmmyy", this.getField("WeekBegin").valueastring); // create date object using WeekNumber input
var nWeekNumber = oDate.getWeek(); // get the week number for the date object;
//app.alert("For " + util.printd("ddmmyy", oDate) + " it is week " + nWeekNumber, 3, 0);

this.getField("WeekNumber").value = nWeekNumber;

And I have this code at document level:

/*** Get the ISO week date week number */

Date.prototype.getWeek = function () {
    // Create a copy of this date object;
    var target  = new Date(this.valueOf());
    //var target  = new Date(this.getField("WeekBegin").value);

    // ISO week date weeks start on Monday;
    // so correct the day number;
    var dayNr   = (this.getDay() + 6) % 7;

    // ISO 8601 states that week 1 is the week;
    // with the first Thursday of that year.;
    // Set the target date to the Thursday in the target week;
    target.setDate(target.getDate() - dayNr + 3);

    // Store the millisecond value of the target date;
    var firstThursday = target.valueOf();

    // Set the target to the first Thursday of the year;
    // First set the target to January first
    target.setMonth(0, 1);
    // Not a Thursday? Correct the date to the next Thursday
    if (target.getDay() != 4) {
        target.setMonth(0, 1 + ((4 - target.getDay()) + 7) % 7);
    }

    // The weeknumber is the number of weeks between the
    // first Thursday of the year and the Thursday in the target week
    return 1 + Math.ceil((firstThursday - target) / 604800000); // 604800000 = 7 * 24 * 3600 * 1000
}

Is this correct? as I'm still not getting anything?

[#8]

Yes. Why do you keep insisting on changing valueAsString to valueastring? The first exists, the second doesn't. JS is case-sensitive, plus you're missing an "s"...

[#9]

opps, sorry fixed that.

so its now:

//var oDate = new Date(); // create date object;
var oDate = util.scand("ddmmyy", this.getField("WeekBegin").valueAsString); // create date object using WeekNumber input
var nWeekNumber = oDate.getWeek(); // get the week number for the date object;
//app.alert("For " + util.printd("ddmmyy", oDate) + " it is week " + nWeekNumber, 3, 0);

this.getField("WeekNumber").value = nWeekNumber;

But still no luck?

[#10]

Where did you put the code?

What does "still no luck" mean? What exactly happens? Is there an error message in the JS Console? If so, what does it say?

Details, please.

[#11]

nothing happens.

in JS Console I get this:

TypeError: oDate.getWeek is not a function

3:Field:Mouse Up

[#12]

You have to include the getWeek function definition with it...

[#13]

I put the code in the field. (as a "Refresh" button to be precise that way if I change the dates I can refresh)