Re define toString function for Date object

Date.prototype.toString = function() {
 var h,i,s,d,m,y;
 h = this.getHours();
 i = this.getMinutes();
 s = this.getSeconds();
 
 d = this.getDate();
 m = this.getMonth() + 1;
 y = this.getFullYear();
 
 h = _2(h);i = _2(i);s = _2(s);
 d = _2(d);m = _2(m);
 return h + ":" + i + ":" + s + " " + d + "/" + m + "/" + y;
 
 function _2(i){if (i < 10) i = "0" + new String(i); return i;}
}

var cur = new Date();
document.write(cur);