Javascript Date getPaddedMinutes(_this)

Date.prototype.getPaddedMinutes = function(_this)
{
 if(_this === undefined) _this = this;
 var m = _this.getMinutes();
 if(m < 10) m = '0' + m;
 return m;/*w w w.  j a v a 2 s .  c  om*/
};
Date.prototype.getPaddedHours = function(_this)
{
 if(_this === undefined) _this = this;
 var h = _this.getHours();
 if(h < 10) h = '0' + h;
 return h;
};
Date.prototype.getPaddedSeconds = function(_this)
{
 if(_this === undefined) _this = this;
 var s = _this.getSeconds();
 if(s < 10) s = '0' + s;
 return s;
};
Date.prototype.getSmallChatStamp = function(_this)
{
 if(_this === undefined) _this = this;
 return _this.getPaddedHours() + ':' + _this.getPaddedMinutes();
};
Date.prototype.getLargeChatStamp = function(_this)
{
 if(_this === undefined) _this = this;
 return _this.getPaddedHours() + ':' + _this.getPaddedMinutes() + ':' + _this.getPaddedSeconds();
};