String.prototype.endsWith = function(str) {
  var lastIndex = this.lastIndexOf(str);
  return (lastIndex != -1) && (lastIndex + str.length == this.length);
};

//// Array Remove - By John Resig (MIT Licensed)
//Array.prototype.remove = function(from, to) {
//  var rest = this.slice((to || from) + 1 || this.length);
//  this.length = from < 0 ? this.length + from : from;
//  return this.push.apply(this, rest);
//};