// wanted format 2009-07-20
var months = { Jan:1, Feb:2, Mar:3, Apr:4, May:5, Jun:6, Jul:7, Aug:8, Sep:9, Oct:10, Nov:11, Dec:12 };
var parts = (""+new Date()).split(" ");
document.getElementById("date_filter[value][date]").value=parts[2]+"-"+parts[1]+"-"+parts[3]