Question

I’m having problems with the following JavaScript code. I coded in the comments what’s happening:

function fetchMaand() {
    var dteBegin, dteEnd, clsDate, monthsAhead;
    monthsAhead = $('#dteMaand').val(); // dteMaand's value = -3 for example
    clsDate = new Date(); // Current time
    clsDate.setMonth(clsDate.getMonth() + monthsAhead); // Here it starts doing weird (date is somewhere in 2015 ??)
    clsDate.setDate(1);
    dteBegin = formatBIN(clsDate);
    clsDate.setDate(30);
    dteEind = formatBIN(clsDate);
    $.get("jsexec/agenda_array_gebeurtenissen.cfm", {
        begindatum : dteBegin,
        einddatum  : dteEind
    } , fillMaandBox);
}

function fillMaandBox(result) {
    // Handle data
}

function formatBIN(date) {
    return date.getFullYear() + "-" + to2(date.getMonth() + 1) + "-" + to2(date.getDate())
}

function to2(i) {
    return  ("00" + i).substr(("00" + i).length - 2 , 2);
}

Could you please help me out? This is part of a calendar website from me, and I am trying to make a combobox with the month (dteMaand) and if you make a change to that combo, the first function is called (fetchMaand() )

The code is supposed to do the following:

• A user changes the combobox with a month (current month is selected), and the value of the combobox is the relative index (eg. this month is July, May will be -2)
• The function fetchMaand will be called in the onchange event.

My real question is acutally on this one “Why is the date somewhere in 2015?”. Wat am I doing wrong in this code?

Thanks!

Yvan

Answer 1

Not 100% sure this’ll help but I’d change:

monthsAhead = $('#dteMaand').val();

to

monthsAhead = parseInt($('#dteMaand').val(), 10);

Also @Tim is correct: you should do that setDate(1) before bumping the months forward or backwards.