date minus 6 months javascript code example

Example 1: minus month javascript date

var d = new Date("January 14, 2012");
console.log(d.toLocaleDateString());
d.setMonth(d.getMonth() - 3);
console.log(d.toLocaleDateString());

Example 2: javascript after 2 months date find

var newDate = new Date(date.setMonth(date.getMonth()+8));

var jan312009 = new Date(2009, 0, 31);
var eightMonthsFromJan312009  = jan312009.setMonth(jan312009.getMonth()+8);
//@SUJAY