jqeury datebox yyyy-mm-dd 형태로 뽑아내기

/* easyui datebox formatter */
$.fn.datebox.defaults.formatter = function(date)
{
    var y = date.getFullYear();
    var m = date.getMonth()+1;
    var d = date.getDate();
    m = ((m < 10) ? '0' : 0) + m;
    d = ((d < 10) ? '0' : 0) + d;
    return y + '-' + m + '-' + d;
};