Question

var now = new Date();
var dateString = now.getMonth() + "-" + now.getDate() + "-" + now.getFullYear() + " "
+ now.getHours() + ":" + now.getMinutes() + ":" + now.getSeconds();

here month is not displayed correctly.

Example if output is december it prints november

now.getMonth() +1 would display the correct month.

I am looking for a more better approach.

My application has to choose between two radiobuttons.the first option should return the current system date and time and other returns date and time selected from jsp.
On selecting either of the two options,it should return a date in a specific format to the controller.

Answer 1

getMonth() by definition returns month from 0 to 11.

If you are not used to this, you can change the prototype of a Date object:

Date.prototype.getFixedMonth = function(){
    return this.getMonth() + 1;
}

new Date().getFixedMonth(); //returns 12 (December)
new Date("January 1 2012").getFixedMonth //returns 1 (January)

But this is not recommended at all.

---

Another approach

You can do this too if you want:

Date.prototype._getMonth = Date.prototype.getMonth;
Date.prototype.getMonth = function(){       //override the original function
    return this._getMonth() + 1;
}

new Date().getMonth(); //returns 12 (December)
new Date("January 1 2012").getMonth //returns 1 (January)