JavaScript: format date as yyyy-mm-dd hh:mm:ss

//format date as yyyy-mm-dd hh:mm:ss
Number.prototype.padLeft = function(base,chr){
    var  len = (String(base || 10).length - String(this).length)+1;
    return len > 0 ? new Array(len).join(chr || '0')+this : this;
}

function getFormatDate(dt) {
    var fdate = [ dt.getFullYear(),
                 (dt.getMonth()+1).padLeft(),
                  dt.getDate().padLeft() ].join('-')
                  + " " +
                [ dt.getHours().padLeft(),
                  dt.getMinutes().padLeft(),
                  dt.getSeconds().padLeft()].join(':');
    return fdate;
}

var dt = new Date();
var fdate = getFormatDate(dt);
console.log(fdate);

//Original code from http://jsfiddle.net/KooiInc/mthdA/