Here you can find the source of addWeeks(value)
Date.prototype.addWeeks = function(value) { this.addDays(value * 7);/*from w w w . ja va2 s . co m*/ return this; };
Date.prototype.addWeeks = function(w) { this.addDays(w * 7); }; Date.prototype.addDays = function(d) { this.setDate(this.getDate() + d); };
Date.prototype.addWeeks = function(w)
this.addDays(w * 7);
};