Get Weeks In Month Through Javascript

Question

In Javascript, how do I get the number of weeks in a month? I can\'t seem to find code for this anywhere.

I need this to be able to know how many rows I need for a g

Answer 1

This works for me,

function(d){
    var firstDay = new Date(this.getFullYear(), this.getMonth(), 1).getDay();
    return Math.ceil((d.getDate() + (firstDay - 1))/7);
}

"d" should be the date.