set date in input type date

document.getElementById("datePicker").valueAsDate = new Date()

should work.

Fiddle link : http://jsfiddle.net/7LXPq/93/

Two problems in this:

1. Date control in HTML 5 accepts in the format of Year - month - day as we use in SQL
2. If the month is 9, it needs to be set as 09 not 9 simply. So it applies for day field also.

Please follow the fiddle link for demo:

var now = new Date();

var day = ("0" + now.getDate()).slice(-2);
var month = ("0" + (now.getMonth() + 1)).slice(-2);

var today = now.getFullYear()+"-"+(month)+"-"+(day) ;

$('#datePicker').val(today);