Javascript Date getFormatDateTime()

Date.prototype.getFormatDateTime = function () {
 var pad = function (number) {
  if ( number < 10 ) {
   return '0' + number;
  }//from  w w  w  . ja  v  a 2  s. co  m
  return number;
 }

 return this.getFullYear() 
  + '-' 
  + pad( this.getMonth() + 1 ) 
  + '-' 
  + pad( this.getDate() ) 
  + ' ' 
  + pad( this.getHours() ) 
  + ':' 
  + pad( this.getMinutes() 
 );
};