Array.prototype.getUnique = function(){
   var u = {}, a = [];
   for(var i = 0, l = this.length; i < l; ++i){
      if(this[i] in u)
         continue;
      a.push(this[i]);
      u[this[i]] = 1;
   }
   return a;
}

http://stackoverflow.com/questions/1960473/unique-values-in-an-array/1961068#1961068

Thanks to the original author.

Unique array in JavaScript

javascript, array

JavaScript