date format

date format.js

// Example usage niceFormat
// new Date().niceFormat('yyyy-mm-dd hh:ii:ss')

// Example usage countdown
// new Date().countdown(dateInFuture,'ii:ss')
// try with new Date().countdown(new Date(new Date().getTime()+3600000),"ii:ss")

(function(){
  
  var a = {
    yyyy: "getFullYear",
    yy: "getFullYear",
    mm: "getMonth",
    dd: "getDate",
    hh: "getHours",
    ii: "getMinutes",
    ss: "getSeconds"
  };

  Date.prototype.niceFormat = function(format){

    var d = this;
    var f = format;
    var t;

    for(var i in a){
      t = 0;
      t += i == "ii" && format.indexOf('hh') < 0 ? d[a['hh']]()*60 : 0;
      t += i == "ss" && format.indexOf('ii') < 0 ?
        d[a['hh']]()*3600 + d[a['ii']]()*60  : 0;
      t += (d[a[i]]() + (i == "mm" ? 1 : 0));
      t += '';
      t = t.length < 2 ? "0" + t : t;
      t = i == "yy" ? t.substring(t.length-2) : t;
      f = f.split(i).join(t);
    }

    return f;

  };

  Date.prototype.countdown = function(date2,format){
    // no dates just hh:ii:ss or ii:ss or ss
    var diff = date2.getTime() - this.getTime();
    var a = new Date("0000-01-01 00:00");
    if(diff>0){
      a = new Date(a.getTime()+diff);
    }
    var f = a.niceFormat(format);
    return f;

  };

})();