how to get first day and last day of the week number and year
For example if i give the input like 2(week),2012 it should return the values
  2012-01-08 and 2012-01-14

var year = 2012;
var week = 2;
var d = new Date("Jan 01, "+year+" 01:00:00");
var w = d.getTime() + 604800000 * (week-1);
var n1 = new Date(w);
var n2 = new Date(w + 518400000)