Javascript String repeatify(times) method

// Define a repeatify function on the String object. 
// The function accepts an integer that specifies 
// how many times the string has to be repeated. 
// The function returns the string repeated the number of times specified. 

// For example://from  ww w .j a va2s  .  com
// console.log('hello'.repeatify(3));
// Should print hellohellohello.

String.prototype.repeatify = String.prototype.repeatify || function(times) {
   var str = '';
   for (var i = 0; i < times; i++) {
      str += this;
   }
   return str;
};